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REVIEW 4 major objections 6 minor 56 references

Laser patterning of the room temperature van der Waals ferromagnet 1$T$-CrTe$_2$

T0 review · 4 major / 6 minor · reviewed 2026-08-10 · deepseek-v4-flash

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Pith's one-line read A focused laser can transform regions of the ferromagnet 1T-CrTe2 into non-magnetic Cr-intercalated compounds, imprinting micron-scale lateral magnetic junctions, while h-BN encapsulation preserves room-temperature ferromagnetism in…

desk verdict A genuinely useful heat-management idea for laser patterning of a room-temperature vdW ferromagnet, with the main caveat that the written nonmagnetic phase is identified only by Raman fingerprints. read the letter →

arxiv 2501.16736 v1 pith:EQU22DS6 submitted 2025-01-28 cond-mat.mtrl-sci

Tristan Riccardi , Suman Sarkar , Anike Purbawati , Aloïs Arrighi , Marek Kostka , Abdellali Hadj-Azzem , Jan Vogel , Julien Renard
show 14 more authors
Laëtitia Marty Amit Pawbake Clément Faugeras Kenji Watanabe Takashi Taniguchi Aurore Finco Vincent Jacques Lei Ren Xavier Marie Cedric Robert Manuel Nuñez-Regueiro Nicolas Rougemaille Nedjma Bendiab Johann Coraux
This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords vanderWaalsferromagnet1T-CrTe2laserpatterningphasetransformationlateralmagneticjunctionhexagonalboronnitrideRamanthermometryKerrmagnetometry
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This paper reports a way to draw magnetic patterns inside a room-temperature van der Waals ferromagnet, 1T-CrTe2, using a focused laser beam. The authors show that local laser heating irreversibly transforms thin flakes of the ferromagnet into chromium-intercalated telluride phases such as $\mathrm{Cr_5Te_8}$, which do not order magnetically at 300 K. Because the transformation is controlled by how well the substrate conducts heat away, poorly conducting SiO2 allows direct laser writing of non-magnetic lines, while a structured hexagonal boron nitride (h-BN) layer can act as a heat stencil to define the transformed regions. The authors also find that encapsulating the flake in h-BN protects it from laser-induced transformation, allowing them to observe room-temperature ferromagnetism in an 11-layer flake, thinner than any previously reported exfoliated 1T-CrTe2.

What carries the argument

The mechanism that carries the argument is the heat-induced polymorphism of 1T-CrTe2: upon heating above roughly 500 K, the material transforms into chromium-intercalated $\mathrm{Cr}_x\mathrm{Te}_y$ phases with Cr:Te ratios larger than 1/2, most notably $\mathrm{Cr_5Te_8}$, which have magnetic ordering temperatures below 300 K. The paper exploits two measurable consequences of this transition. First, the red-shift of the two characteristic Raman modes of 1T-CrTe2 ($E_{2g}$ near 102 cm$^{-1}$ and $A_{1g}$ near 135 cm$^{-1}$) acts as a local thermometer, calibrated against controlled global heating, to convert laser power into local temperature rise on each substrate. Second, focused Kerr magnetometry reports whether a region has retained its ferromagnetic hysteresis at 300 K. The substrate sets the temperature rise: SiO2 (thermal conductivity about 1 W m$^{-1}$ K$^{-1}$) accumulates heat, while Pt/Ta (about 70 W m$^{-1}$ K$^{-1}$) and h-BN (about 400 W m$^{-1}$ K$^{-1}$) dissipate it, which is why the same laser power transforms the material on SiO2 but not on the better conductors.

What would settle it

A direct test would be to cut a cross-section through a laser-written line and analyze its chemical composition and crystal structure with transmission electron microscopy and energy-dispersive X-ray spectroscopy, to confirm it is Cr5Te8 (or another Cr_xTe_y with x/y > 1/2) rather than an oxidized or Te-deficient phase. A complementary magnetic test would be to map the same line at nanoscale resolution with nitrogen-vacancy magnetometry or magnetic force microscopy at 300 K: the central claim predicts zero magnetic signal from the written region while the surrounding 1T-CrTe2 remains ferromagnetic.

Watch

Extended reading notes

Core claim

The central claim is that a focused laser beam can locally and irreversibly heat thin flakes of the room-temperature ferromagnet 1T-CrTe2, converting them into Cr self-intercalated $\mathrm{Cr}_x\mathrm{Te}_y$ compounds ($x/y > 1/2$, most likely $\mathrm{Cr_5Te_8}$) whose Curie temperature falls below 300 K. This creates a planar junction between a ferromagnetic matrix and non-magnetic (at room temperature) regions, i.e., a lateral magnetic junction. The transformation is mediated by the substrate: on SiO2/Si, which conducts heat poorly, moderate laser powers (above roughly 2 mW in a 1 µm spot) fully transform the material; on metallic Pt/Ta or on h-BN, heat dissipates efficiently and the flake remains 1T-CrTe2. Using a cracked h-BN buffer layer as a natural heat stencil, the authors demonstrate selective transformation of the regions of the same flake lying directly on SiO2. Finally, h-BN encapsulation is shown to be heat-protective, and under such capping an 11-layer flake retains its ferromagnetic hysteresis at 300 K.

Load-bearing premise

The load-bearing premise is that the Raman peaks seen after irradiation prove that the material has become a chromium-intercalated telluride such as Cr5Te8, and that this phase is not ferromagnetic at 300 K.

Editorial extensions

If this is right

  • Micron-scale lateral magnetic junctions can be written directly by scanning a laser across a 1T-CrTe2 flake on SiO2/Si, with no lithography or chemical processing.
  • Structured h-BN layers between the flake and the substrate act as heat stencils, so the spatial resolution of the written pattern is set by the h-BN pattern rather than by the diffraction-limited laser spot.
  • h-BN encapsulation suppresses laser-induced transformation and thereby allows room-temperature ferromagnetism to be observed in exfoliated 1T-CrTe2 down to 11 layers.
  • Any laser-based spectroscopy or magnetometry of thin 1T-CrTe2 flakes on SiO2/Si risks unintentional transformation; h-BN capping or the lowest feasible laser power is a necessary precaution.
  • The approach opens a route to fully van der Waals lateral spintronic devices, such as lateral spin valves with non-magnetic $\mathrm{Cr}_x\mathrm{Te}_y$ barriers embedded in a ferromagnetic matrix.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • The same heat-stencil logic could extend to other van der Waals magnets that have a heat-driven transition to a non-magnetic (or differently magnetic) phase, making the method a general top-down patterning tool rather than a CrTe2-specific trick.
  • The narrowest achievable non-magnetic line width will be limited by lateral heat spreading in the 1T-CrTe2 flake itself, a quantity the paper leaves unmeasured; measuring it would set the practical resolution of the technique.
  • The 11-layer room-temperature ferromagnetism result suggests that earlier failures to see ferromagnetism in thin uncapped flakes may have been caused by the measurement light itself transforming the material, rather than by an intrinsic thickness limit.
  • If the laser-written regions are indeed $\mathrm{Cr_5Te_8}$, they could serve not only as electrical barriers but as sources or detectors of spin current, since some $\mathrm{Cr}_x\mathrm{Te}_y$ phases host skyrmions or spin-orbit torques.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 6 minor

Summary. The manuscript reports a top-down method for lateral magnetic patterning of the room-temperature van der Waals ferromagnet 1T-CrTe2 by focused-laser-induced local phase transformation. Above a power threshold on poorly heat-conducting SiO2/Si substrates, the Raman spectra irreversibly develop features attributed to Cr-intercalated Cr_xTe_y phases (notably Cr5Te8), and focused-Kerr magnetometry shows a weakened or absent hysteresis loop at 300 K in irradiated regions. The authors calibrate the Raman peak shifts against global temperature to convert laser power into local temperature, and they show that Pt/Ta and h-BN substrates dissipate heat much more efficiently than SiO2, allowing selective transformation only where a structured h-BN heat stencil is absent. Finally, they report that h-BN encapsulation protects thin flakes from laser-induced transformation and enables observation of room-temperature ferromagnetism in an 11-layer flake.

Significance. If the phase transformation and magnetic deadness of the written regions are confirmed, the work introduces a simple and useful tool for writing lateral ferromagnetic/non-ferromagnetic junctions in a room-temperature 2D ferromagnet, with clear potential for all-van-der-Waals lateral spintronics. The paper has several genuine strengths: the laser-power-to-temperature conversion is based on an independent global-temperature calibration rather than on free parameters; the substrate dependence of the Raman shifts is measured on the same flake (SiO2 versus h-BN) and is internally consistent with heat dissipation; the irreversibility threshold is demonstrated; and the h-BN capping result is a substantive contribution to the thin-flake CrTe2 literature. However, the central magnetic-junction claim currently rests on an indirect identification of the laser-written phase, and the single-spot Kerr null in Fig. 4d is not a quantitative proof that the written material is magnetically dead at 300 K.

major comments (4)
  1. [§3 'Lateral magnetic patterning', Figs. 3c-e and 4b-c] The assignment of the laser-written regions to non-ferromagnetic Cr_xTe_y (x/y>1/2, specifically Cr5Te8) is based solely on two Raman metrics—the 137/124 cm^-1 intensity ratio and the 100-155 cm^-1 integrated area—compared with literature spectra (refs. 32-37) and the authors' annealing study (ref. 24). No compositional, structural, or local magnetic measurement is made directly on a laser-written pattern. Since the claim of a magnetic/non-magnetic junction requires the written phase to have no 300-K ferromagnetic order, a residual weakly ferromagnetic CrTe2 fraction or another ferromagnetic intercalate would invalidate the central conclusion. I request a direct compositional/structural measurement on a written line (e.g., cross-sectional STEM-EDX or micro-XRD), or a temperature-dependent local magnetic measurement across the boundary, or at least a quantitative comparison of the full written-region spectrum (linewidths and all peaks) with the annealed Cr5Te8 standard from ref. 24.
  2. [§3 'Lateral magnetic patterning', Fig. 4d] The sole local magnetic evidence on a patterned region is a single focused-Kerr measurement at one location inside a cracked-h-BN area. A null hysteresis loop on a 1-µm spot has limited sensitivity and cannot distinguish a fully transformed, magnetically dead phase from a partially transformed region with weak or tilted magnetization, or from a paramagnetic contribution. Please provide a spatial line scan of the Kerr signal across the transformed/untreated boundary, or multiple spots within and outside the written area, together with a sensitivity calibration using a known nonmagnetic reference under identical conditions.
  3. [§2 'Substrate-controlled heating', Fig. 2c-d and Table I] The conversion from laser power to local temperature assumes that the Raman red-shift measured under global heating is identical to that under local laser heating, i.e., that strain and photo-induced effects do not contribute. This is a reasonable first-order thermometer, but the manuscript uses the resulting ΔT values (e.g., ΔT ≈ 347 K ±30% in Fig. 3b and the 260 K/60 K contrast in the stencil demonstration) as quantitative support for the selective transformation mechanism. I ask for either a second independent local-temperature estimate at one operating point (e.g., Stokes/anti-Stokes ratio) or a stated uncertainty that includes possible strain contributions.
  4. [§4 'Heat-protective capping with h-BN', Fig. 5c] The claim of room-temperature ferromagnetism in the 11-layer (6.9 nm) h-BN-encapsulated flake rests on a single, very noisy Kerr loop that has been numerically smoothed. Given that this result is highlighted in the abstract and goes beyond previous exfoliated-thickness reports, please show the raw (unsmoothed) data and, if possible, a second independent measurement (another thickness, another flake, or magnetic force microscopy) to confirm that the hysteresis is not an artifact of the smoothing/filtering procedure.
minor comments (6)
  1. [Abstract] The abstract contains two wording errors: 'whose layers are bond by' should be 'whose layers are bonded by', and 'in addition from protecting' should be 'in addition to protecting'.
  2. [Fig. 4 caption] The caption lists '(b) Ratio ... (d) Area under the Raman scattering spectra ...', but the area map is panel (c), not (d); the panel labels should be corrected.
  3. [§1 'Laser-induced local transformations'] The threshold is quoted as '0.73 mW/µm2' in the text near Fig. 1a but as '0.75 mW' later in the same paragraph; since the spot is approximately 1 µm, the units and values should be made consistent.
  4. [Fig. 3a caption] The word 'tranformation' in the cartoon of Fig. 3a is a typo and should read 'transformation'.
  5. [Supporting Material] Several statements rely on Supplemental Material figures (Figs. S1-S4), but that file was not included with the manuscript version under review; please ensure it is available to referees and readers.
  6. [§3 'Lateral magnetic patterning'] The term 'magnetic junction' implies a functional device, whereas the paper demonstrates static patterning and magneto-optical contrast but no transport or spin-injection measurement; consider softening the wording or adding an explicit sentence that transport functionality is not demonstrated.

Circularity Check

0 steps flagged · score 1.0 of 10

No significant circularity; the power-to-temperature calibration is independent and the phase assignment rests on external prior work, not on a definitional loop.

full rationale

The paper's derivation chain is: laser power produces local heating; Raman-mode shifts calibrated against both global sample temperature and laser power convert power to local temperature; sufficient heating irreversibly transforms 1T-CrTe2 into Cr_xTe_y compounds with x/y > 1/2; these compounds order magnetically below 300 K; therefore laser-written regions become nonmagnetic at room temperature and form lateral magnetic junctions. The power-to-temperature conversion is an independent calibration, not a parameter fitted to the patterning outcome: the same Raman modes are measured as functions of a controlled global temperature (Fig. 2d) and of laser power (Fig. 2c), and the two independent slopes are combined. The phase identification and the sub-300 K ordering temperatures are imported from Ref. 24, a prior annealing study by the same group, and from Refs. 32-37, which are external literature. Ref. 24 itself reports compositional, structural, vibrational, and magnetic characterization of the annealed products, so the self-citation is genuine independent evidence rather than a self-referential premise. Focused-Kerr magnetometry provides direct magnetic data on the irradiated regions, and the h-BN heat-stencil experiment supplies a direct on-h-BN/off-h-BN comparison. The principal weakness is indirectness: no EDX, TEM, or XRD is performed directly on the laser-written patterns, so the exact identity and magnetic deadness of the written phase are inferred from Raman fingerprints and prior annealing results. That is a correctness risk, not circularity. No fitted quantity is renamed as a prediction, no uniqueness theorem is invoked, and no central claim reduces by construction to its inputs. The score of 1 reflects only minor, non-load-bearing self-citations in the supporting background and heat-dissipation discussion.

Assumptions & free parameters 0 free parameters · 4 assumptions · 0 invented entities

The central claims rest on several calibration and identification assumptions, listed above. No arbitrary free parameters are fitted to reach the results, and no new physical entities are introduced. The main burden is the indirect identification of the transformed phase and the extrapolated thermal calibration.

assumptions (4)
  • domain assumption Raman peak red-shifts with laser power are purely thermal, and the slopes measured in global heating experiments remain valid for local laser heating, including at temperatures beyond the calibrated 100 K range.
    Used to convert laser power into local temperature increase (Fig. 2c,d, Table I); the paper extrapolates the linear slope to delta T up to roughly 400 K on SiO2/Si, outside the measured range.
  • domain assumption The Raman peaks that appear after irradiation at about 125 and 144 cm^-1 uniquely identify Cr_xTe_y compounds with x/y > 1/2, notably Cr5Te8, and these compounds have Curie temperatures below 300 K.
    Identification relies on prior literature and the authors' annealing study (refs 24, 32-37); the paper does not perform compositional or structural analysis on the laser-written patterns.
  • domain assumption The disappearance of the Kerr hysteresis signal in irradiated regions is caused by loss of ferromagnetic 1T-CrTe2 material and not by optical or topographic changes from laser damage.
    Complementary Raman maps support phase transformation, but the Kerr contrast alone could in principle be affected by surface modification or reduced reflectivity.
  • domain assumption h-BN encapsulation protects thin flakes from transformation through heat dissipation alone, with no significant effect on the magnetic anisotropy or on the Raman and Kerr responses.
    The paper attributes preserved room-temperature ferromagnetism in 11-layer flakes to reduced laser heating; strain, doping, or altered magnetic anisotropy from h-BN are not discussed.

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Pith. "Pith review of Laser patterning of the room temperature van der Waals ferromagnet 1$T$-CrTe$_2$." pith.science (2026). https://pith.science/paper/EQU22DS6

@misc{pith2026250116736,
  author       = {Pith},
  title        = {Pith review of: Laser patterning of the room temperature van der Waals ferromagnet 1$T$-CrTe$_2$},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/EQU22DS6}},
  note         = {Machine review of arXiv:2501.16736}
}
abstract

Lamellar crystalline materials, whose layers are bond by van der Waals forces, can be stacked to form ultrathin artificial heterostructures, and in particular vertical magnetic junctions when some of the stacked materials are (ferro)magnetic. Here, using the room temperature van der Waals ferromagnet 1$T$-CrTe$_2$, we report a method for patterning lateral magnetic junctions. Exploiting the heat-induced phase transformation of the material into Cr$_x$Te$_y$ compounds ($x/y>1/2$), we use local laser heating to imprint patterns at the micron-scale. Optimizing laser heat dissipation, we further demonstrate the crucial role of the substrate to control the phase transformation. If plain, unstructured poorly heat-conducting substrates allow for direct writing of magnetic patterns, structured $h$-BN layers can serve as heat stencils to draw potentially thinner patterns. Besides, $h$-BN encapsulation turns out to be heat-protective (in addition from protecting against oxidation as it is generally used for), allowing the demonstration of room temperature ferromagnetism in $<$7~nm-thick 1$T$-CrTe$_2$.

Figures

Figures reproduced from arXiv: 2501.16736 by the authors.

Figure 1
Figure 1. FIG. 1. Laser-induced local transformation of 1 [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. FIG. 2. Raman thermometry of Cr-Te flakes on differ [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. FIG. 3. Direct laser patterning of 1 [PITH_FULL_IMAGE:figures/full_fig_p005_3.png] view at source ↗
Figures from the paper (2 more)
Figure 4
Figure 4. Figure 4: FIG. 4. Laser patterning of 1 [PITH_FULL_IMAGE:figures/full_fig_p006_4.png]
Figure 5
Figure 5. Figure 5: FIG. 5. Thin encapsulated 1 [PITH_FULL_IMAGE:figures/full_fig_p007_5.png]

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Works this paper leans on

56 extracted references · 54 canonical work pages

  1. [1]

    J.-U. Lee, S. Lee, J. H. Ryoo, S. Kang, T. Y. Kim, P. Kim, C.-H. Park, J.-G. Park, and H. Cheong, Ising- type magnetic ordering in atomically thin FePS 3, Nano Lett. 16, 7433 (2016)

    work page 2016

  2. [2]

    X. Wang, K. Du, Y. Y. F. Liu, P. Hu, J. Zhang, Q. Zhang, M. H. S. Owen, X. Lu, C. K. Gan, P. Sengupta, C. Kloc, and Q. Xiong, Raman spec- troscopy of atomically thin two-dimensional magnetic iron phosphorus trisulfide (FePS3) crystals, 2D Mater. 3, 031009 (2016)

    work page 2016

  3. [3]

    Huang, G

    B. Huang, G. Clark, E. Navarro-Moratalla, D. R. Klein, R. Cheng, K. L. Seyler, D. Zhong, E. Schmidgall, M. A. McGuire, D. H. Cobden, W. Yao, D. Xiao, P. Jarillo-Herrero, and X. Xu, Layer- dependent ferromagnetism in a van der Waals crystal down to the monolayer limit, Nature 546, 270 (2017)

    work page 2017

  4. [4]

    C. Gong, L. Li, Z. Li, H. Ji, A. Stern, Y. Xia, T. Cao, W. Bao, C. Wang, Y. Wang, Z. Q. Qiu, R. J. Cava, S. G. Louie, J. Xia, and X. Zhang, Discovery of intrin- sic ferromagnetism in two-dimensional van der Waals crystals, Nature 546, 265 (2017)

    2017

  5. [5]

    Gibertini, M

    M. Gibertini, M. Koperski, A. Morpurgo, and K. Novoselov, Magnetic 2D materials and heterostruc- tures, Nat. Nanotechnol. 14, 408 (2019)

    work page 2019

  6. [6]

    Q. H. Wang, A. Bedoya-Pinto, M. Blei, A. H. Dis- mukes, A. Hamo, S. Jenkins, M. Koperski, Y. Liu, Q.- C. Sun, E. J. Telford, et al., The magnetic genome of two-dimensional van der Waals materials, ACS Nano 16, 6960 (2022)

    work page 2022

  7. [7]

    Purbawati, J

    A. Purbawati, J. Coraux, J. Vogel, A. Hadj-Azzem, N. Wu, N. Bendiab, D. Jegouso, J. Renard, L. Marty, V. Bouchiat, A. Sulpice, L. Aballe, M. Foerster, F. Genuzio, A. Locatelli, T. O. Mente¸ s, Z. V. Han, X. Sun, M. N´ u˜ nez Regueiro, and N. Rougemaille, In- plane magnetic domains and N´ eel-like domain walls in thin flakes of the room temperature CrTe 2 ...

    work page 2020

  8. [8]

    X. Sun, W. Li, X. Wang, Q. Sui, T. Zhang, Z. Wang, L. Liu, D. Li, S. Feng, S. Zhong, H. Wang, V. Bouch- iat, M. N´ u˜ nez Regueiro, N. Rougemaille, J. Coraux, A. Purbawati, A. Hadj-Azzem1, Z. Wang, B. Dong, X. Wu, T. Yang, G. Yu, B. Wang, Z. Han, X. Han, and Z. Zhang, Room temperature ferromagnetism in ultra-thin van der Waals crystals of 1T-CrTe 2, Nano ...

    work page 2020

Show all 56 references
  1. [9]

    K. D. R¨ oseler, C. Witteveen, C. Besnard, V. Pom- jakushin, H. O. Jeschke, and F. O. von Rohr, Efficient soft-chemical synthesis of large van-der-Waals crys- tals of the room-temperature ferromagnet 1 T -CrTe2, arXiv preprint 2408.06239 (2024)

    2024 arXiv

  2. [10]

    Huang, S

    M. Huang, S. Wang, Z. Wang, P. Liu, J. Xiang, C. Feng, X. Wang, Z. Zhang, Z. Wen, H. Xu, G. Yu, Y. Lu, W. Zhao, S. Yang A., D. Hou, and B. Xiang, Colossal anomalous Hall effect in ferromagnetic van der Waals CrTe2, ACS Nano 15, 9759 (2021)

    2021

  3. [11]

    H. Chen, S. Asif, M. Whalen, J. T´ amara-Isaza, B. Luetke, Y. Wang, X. Wang, M. Ayako, S. Lam- sal, A. F. May, M. A McGuire, C. Chakraborty, J. Q. Xiao, and M. J. H. Ku, Revealing room temper- ature ferromagnetism in exfoliated Fe 5GeTe2 flakes with quantum magnetic imaging, 2...

    2022

  4. [12]

    G. Hu, H. Guo, S. Lv, L. Li, Y. Wang, Y. Han, L. Pan, Y. Xie, W. Yu, K. Zhu, Q. Qi, G. Xian, S. Zhu, J. Shi, L. Bao, X. Lin, W. Zhou, H. Yang, and H.-j. Gao, Room-temperature antisymmetric magnetoresistance in van der Waals ferromagnet Fe 3GaTe2 nanosheets, Adv. Mater. , 24031...

    2024

  5. [13]

    T. Song, X. Cai, M. W.-Y. Tu, X. Zhang, B. Huang, N. P. Wilson, K. L. Seyler, L. Zhu, T. Taniguchi, K. Watanabe, M. A. McGuire, D. H. Cobden, D. Xiao, W. Yao, and X. Xu, Giant tunneling magne- toresistance in spin-filter van der Waals heterostruc- tures, Science 360, 1214 (2018)

    2018

  6. [14]

    J. Yang, X. Wang, S. Li, X. Wang, M. Pan, M. Ai, H. Yuan, X. Peng, R. Wang, Q. Li, F. Zheng, and P. Zhang, Robust two-dimensional ferromagnetism in Cr5Te8/CrTe2 heterostructure with Curie tempera- ture above 400 K, ACS Nano 17, 23160 (2023)

    2023

  7. [15]

    G. Shi, F. Wang, Y. Liu, Z. Li, H. R. Tan, D. Yang, A. Soumyanarayanan, and H. Yang, Field-free ma- nipulation of two-dimensional ferromagnet CrTe 2 by spin–orbit torques, Nano Lett. 24, 7302–7310 (2024)

    2024

  8. [16]

    F. J. Jedema, A. Filip, and B. Van Wees, Electrical spin injection and accumulation at room temperature in an all-metal mesoscopic spin valve, Nature410, 345 (2001)

    2001

  9. [17]

    Kimura and Y

    T. Kimura and Y. Otani, Large spin accumulation in a permalloy-silver lateral spin valve, Phys. Rev. Lett. 99, 196604 (2007)

    2007

  10. [18]

    Tombros, C

    N. Tombros, C. Jozsa, M. Popinciuc, H. T. Jonkman, and B. J. Van Wees, Electronic spin transport and spin precession in single graphene layers at room tem- perature, Nature 448, 571 (2007)

    2007

  11. [19]

    S. O. Valenzuela and M. Tinkham, Direct electronic measurement of the spin hall effect, Nature 442, 176 (2006)

    2006

  12. [20]

    E. C. Ahn, 2D materials for spintronic devices, npj 2D Mater. Appl. 4, 17 (2020)

    2020

  13. [21]

    Li, J.-H

    R. Li, J.-H. Nie, J.-J. Xian, J.-W. Zhou, Y. Lu, M.- P. Miao, W.-H. Zhang, and Y.-S. Fu, Planar hetero- junction of ultrathin CrTe3 and CrTe2 van der Waals magnet, ACS Nano 16, 4348 (2022)

    2022

  14. [22]

    S. Cho, S. Kim, J. H. Kim, J. Zhao, J. Seok, D. H. Keum, J. Baik, D.-H. Choe, K. J. Chang, K. Suenaga, S. W. Kim, Y. H. Lee, and H. Yang, Phase patterning for ohmic homojunction contact in MoTe 2, Science 349, 625 (2015)

    2015

  15. [23]

    R. Saha, H. L. Meyerheim, B. G¨ obel, B. K. Hazra, H. Deniz, K. Mohseni, V. Antonov, A. Ernst, D. Knyazev, A. Bedoya-Pinto, I. Mertig, and S. S. P. Parkin, Observation of N´ eel-type skyrmions in acen- tric self-intercalated Cr 1+δTe2, Nat. Commun. 13, 3965 (2022)

    2022

  16. [24]

    Purbawati, S

    A. Purbawati, S. Sarkar, S. Pairis, M. Kostka, A. Hadj-Azzem, D. Dufeu, P. Singh, D. Bourgault, M. Nu˜ nez Regueiro, J. Vogel, J. Renard, L. Marty, F. Fabre, A. Finco, V. Jacques, L. Ren, V. Tiwari, C. Robert, X. Marie, N. Bendiab, N. Rougemaille, and 8 J. Coraux, Stability of...

    2023

  17. [25]

    Figueiredo-Prestes, P

    N. Figueiredo-Prestes, P. Tsipas, S. Krishnia, P. Pap- pas, J. Peiro, S. Fragkos, V. Zatko, A. Lintzeris, B. Dlubak, S. Chaitoglou, M. Heuken, N. Reyren, H. Jaffr` es, P. Seneor, A. Dimoulas, and J.-M. George, Large fieldlike spin-orbit torque and mag- netization manipulation ...

    2023

  18. [26]

    K. Niu, G. Qiu, C. Wang, D. Li, Y. Niu, S. Li, L. Kang, Y. Cai, M. Han, and J. Lin, Self-intercalated magnetic heterostructures in 2D chromium telluride, Adv. Func. Mater. 33, 2208528 (2023)

    2023

  19. [27]

    D. C. Freitas, R. Weht, A. Sulpice, G. Remenyi, P. Strobel, F. Gay, J. Marcus, and M. N´ u˜ nez- Regueiro, Ferromagnetism in layered metastable 1T- CrTe2, J. Phys.: Condens. Matter 27, 176002 (2015)

    2015

  20. [28]

    Castellanos-Gomez, M

    A. Castellanos-Gomez, M. Buscema, R. Molenaar, V. Singh, L. Janssen, H. S. Van Der Zant, and G. A. Steele, Deterministic transfer of two-dimensional ma- terials by all-dry viscoelastic stamping, 2D Mater. 1, 011002 (2014)

    2014

  21. [29]

    C. R. Dean, A. F. Young, I. Meric, C. Lee, L. Wang, S. Sorgenfrei, K. Watanabe, T. Taniguchi, P. Kim, K. L. Shepard, and J. Hone, Boron nitride substrates for high-quality graphene electronics, Nat. Nanotech- nol. 5, 722 (2010)

    2010

  22. [30]

    We hence do not expect the effects we report to depend on the oxide thickness, as was the case for few layer graphene [56]

    The (metallic) flakes are thick-enough to be fully re- flective, so interference effects that would involve light reflection at the SiO2/Si interface underneath are ir- relevant here. We hence do not expect the effects we report to depend on the oxide thickness, as was the cas...

  23. [31]

    See Supplemental Material at [URL will be inserted by AIP] for VSM-SQUID measurements on bulk flakes and additional temperature-dependant Raman scat- tering spectroscopy data

  24. [32]

    B. Fu, X. Bao, H. Deng, and M. Zhang, Redetermina- tion the basic cell trigonal Cr5Te8 single crystal struc- ture and its temperature dependence raman spectra, J. Solid State Chem. 300, 122222 (2021)

    2021

  25. [33]

    C. Chen, X. Chen, C. Wu, X. Wang, Y. Ping, X. Wei, X. Zhou, J. Lu, L. Zhu, J. Zhou, T. Zhai, J. Han, and H. Xu, Air-stable 2D Cr 5Te8 nanosheets with thickness-tunable ferromagnetism, Adv. Mater. 34, 2107512 (2022)

    2022

  26. [34]

    Zhong, M

    J. Zhong, M. Wang, T. Liu, Y. Zhao, X. Xu, S. Zhou, J. Han, L. Gan, and T. Zhai, Strain-sensitive fer- romagnetic two-dimensional Cr 2Te3, Nano Res. 15, 1254 (2022)

    2022

  27. [35]

    H. Yang, A. Wu, H. Yi, W. Cao, J. Yao, G. Yang, and Y.-C. Zou, Atomic scale insights into the epitaxial growth mechanism of 2D Cr 3Te4 on mica, Nanoscale Adv. 5, 693 (2023)

    2023

  28. [36]

    C. C. Gowda, A. Kartsev, N. Tiwari, A. A. Safronov, P. Pandey, A. K. Roy, P. M. Ajayan, D. S. Galv˜ ao, and C. S. Tiwary, Non-thermal magnetic deicing using two-dimensional chromium telluride, J. Mater. Chem. C 12, 18691 (2024)

    2024

  29. [37]

    Ghorai, K

    G. Ghorai, K. Ghosh, A. Patra, P. Samal, K. Senap- ati, and P. K. Sahoo, Spin-phonon interaction in quasi 2D-Cr2Te3, arXiv preprint 2403.04426 (2024)

    2024 arXiv

  30. [38]

    A. A. Balandin, S. Ghosh, W. Bao, I. Calizo, D. Teweldebrhan, F. Miao, and C. N. Lau, Superior thermal conductivity of single-layer graphene, Nano Lett. 8, 902 (2008)

    2008

  31. [39]

    Sahoo, A

    S. Sahoo, A. P. Gaur, M. Ahmadi, M. J.-F. Guinel, and R. S. Katiyar, Temperature-dependent Raman studies and thermal conductivity of few-layer MoS 2, J. Phys. Chem. C 117, 9042 (2013)

    2013

  32. [40]

    No heat-sink effect is observed here with SiO 2/Si, un- like what was reported with few-layer graphene ir- radiated, on this substrate, with large laser powers (60 mW) [56], or if this effect exists in our case, it appears to be far less prominent than on Pt/Ta or h-BN substrates

  33. [41]

    I. Jo, M. T. Pettes, J. Kim, K. Watanabe, T. Taniguchi, Z. Yao, and L. Shi, Thermal conduc- tivity and phonon transport in suspended few-layer hexagonal boron nitride, Nano Lett. 13, 550 (2013)

    2013

  34. [42]

    Arrighi, E

    A. Arrighi, E. del Corro, D. N. Urrios, M. V. Costache, J. F. Sierra, K. Watanabe, T. Taniguchi, J. A. Garrido, S. O. Valenzuela, C. M. S. Torres, and M. Sledzinska, Heat dissipation in few-layer MoS2 and MoS2/hBN heterostructure, 2D Mater. 9, 015005 (2021)

    2021

  35. [43]

    S2 ωE2g (T ) and ωA1g (T ) for tempera- ture T ∈ [4 K, 300 K] on bulk 1 T -CrTe2 flake [31]

    Although our focus here is on the properties of the van der Waals ferromagnet around room temperature and above it (which may be of relevance for future practical applications), we report, as Supplemental Material Fig. S2 ωE2g (T ) and ωA1g (T ) for tempera- ture T ∈ [4 K, 300...

  36. [44]

    H. Park, G. H. Shin, K. J. Lee, and S.-Y. Choi, Probing temperature-dependent interlayer coupling in a MoS 2/h-BN heterostructure, Nano Res. 13, 576 (2020)

    2020

  37. [45]

    X. F. Yue, Y. Y. Wang, Y. Zhao, J. Jiang, K. Yu, Y. Liang, B. Zhong, S. T. Ren, R. X. Gao, and M. Q. Zou, Measurement of interfacial thermal con- ductance of few-layer MoS 2 supported on different substrates using Raman spectroscopy, J. Appl. Phys. 127, 104301 (2020)

    2020

  38. [46]

    Liu, Z.-Y

    Y. Liu, Z.-Y. Ong, J. Wu, Y. Zhao, K. Watanabe, T. Taniguchi, D. Chi, G. Zhang, J. T. Thong, C.-W. Qiu, et al. , Thermal conductance of the 2D MoS 2/h- BN and graphene/ h-BN interfaces, Sci. Rep. 7, 1 (2017)

    2017

  39. [47]

    There, heat dissi- pation will obviously marginally occur perpendicular to the flake and substantial heating may also occur

    This argument assumes patterns in h-BN with lateral dimensions large enough that a 1 T -CrTe2 flake can bend down to come in contact with the underlying substrate; one may also consider finer patterns, above which the flake will be suspended. There, heat dissi- pation will obv...

  40. [48]

    L. Meng, Z. Zhou, M. Xu, S. Yang, K. Si, L. Liu, X. Wang, H. Jiang, B. Li, P. Qin, P. Zhang, J. Wang, Z. Liu, P. Tang, Y. Ye, W. Zhou, L. Bao, H.-J. Gao, and Y. Gong, Anomalous thickness dependence of Curie temperature in air-stable two-dimensional fer- romagnetic 1T -CrTe2 gr...

    2021

  41. [49]

    R. Chua, J. Zhou, X. Yu, W. Yu, J. Gou, R. Zhu, L. Zhang, M. Liu, M. B. Breese, W. Chen, K. Ping Loh, Y. Ping Feng, M. Yang, Y. Li Huang, and A. T. S. Wee, Room temperature ferromagnetism of monolayer chromium telluride with perpendicular magnetic anisotropy, Adv. Mater.33, 21...

    2021

  42. [50]

    Zhang, Q

    X. Zhang, Q. Lu, W. Liu, W. Niu, J. Sun, J. Cook, M. Vaninger, P. F. Miceli, D. J. Singh, S.-W. Lian, T.- R. Chang, X. He, J. Du, L. He, R. Zhang, G. Bian, and Y. Xu, Room-temperature intrinsic ferromagnetism in epitaxial CrTe2 ultrathin films, Nat. Commun. 12, 9 2492 (2021)

    2021

  43. [51]

    Y. Ou, W. Yanez, R. Xiao, M. Stanley, S. Ghosh, B. Zheng, W. Jiang, Y.-S. Huang, T. Pillsbury, A. Richardella, C. Liu, V. H. Crespi, K. A. Mkhoyan, and N. Samarth, ZrTe 2/CrTe2: an epitaxial van der Waals platform for spintronics, Nat. Commun. 13, 2972 (2022)

    2022

  44. [52]

    Y. Sun, P. Yan, J. Ning, X. Zhang, Y. Zhao, Q. Gao, M. Kanagaraj, K. Zhang, J. Li, X. Lu, Y. Yan, Y. Li, Y. Xu, and L. He, Ferromagnetism in two-dimensional CrTe2 epitaxial films down to a few atomic layers, AIP Adv. 11 (2021)

    2021

  45. [53]

    B. Li, X. Deng, W. Shu, X. Cheng, Q. Qian, Z. Wan, B. Zhao, X. Shen, R. Wu, S. Shi, H. Zhang, Z. Zhang, X. Yang, J. Zhang, M. , Q. Xia, J. Li, Y. Liu, L. Liao, Y. Ye, L. Dai, Y. Peng, B. Li, and X. Duan, Air- stable ultrathin Cr 3Te4 nanosheets with thickness- dependent magnet...

    2022

  46. [54]

    Lasek, P

    K. Lasek, P. M. Coelho, P. Gargiani, M. Valvi- dares, K. Mohseni, H. L. Meyerheim, I. Kostanovskiy, K. Zberecki, and M. Batzill, Van der Waals epi- taxy growth of 2D ferromagnetic Cr(1+δ)Te2 nanolay- ers with concentration-tunable magnetic anisotropy, Appl. Phys. Rev. 9 (2022)

    2022

  47. [55]

    H. Wu, W. Zhang, L. Yang, J. Wang, J. Li, L. Li, Y. Gao, L. Zhang, J. Du, H. Shu, and H. Chang, Strong intrinsic room-temperature ferromagnetism in freestanding non-van der Waals ultrathin 2D crystals, Nat. Commun. 12, 5688 (2021)

    2021

  48. [56]

    G. H. Han, S. J. Chae, E. S. Kim, F. Gunes, I. H. Lee, S. W. Lee, S. Y. Lee, S. C. Lim, H. K. Jeong, M. S. Jeong, and Y. H. Lee, Laser thinning for monolayer graphene formation: heat sink and interference effect, ACS Nano 5, 263 (2011). 10

    2011

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