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REVIEW 3 major objections 4 minor 45 references

Large ferromagnetic-like band splitting in ultrathin ${\mathrm{SmC}}_{6}$ films

T0 review · 3 major / 4 minor · reviewed 2026-08-06 · deepseek-v4-flash

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Pith's one-line read Ultrathin SmC6 films grown by molecular beam epitaxy show valence-band splittings reaching 0.16 eV below about 90 K, which the paper attributes to ferromagnetic order of Sm 4f moments coupled to conduction electrons.

desk verdict Solid ARPES work with a plausible but unconfirmed ferromagnetic assignment; deserves a serious referee despite the missing magnetization measurement. read the letter →

arxiv 2507.11396 v1 pith:VNUIBF7K submitted 2025-07-15 cond-mat.str-el cond-mat.mtrl-sci

Hao Zheng , Yifu Xu , Guowei Yang , Ze Pan , Yi Wu , Yuan Zheng , Tulai Sun , Jiefeng Cao
show 4 more authors
Yi-feng Yang Ming Shi Chao Cao Yang Liu
This is my paper
classification cond-mat.str-elcond-mat.mtrl-sci
keywords two-dimensionalmagnetssamariumcarbide4felectronsbandsplittingangle-resolvedphotoemissionspectroscopyferromagneticexchangemolecularbeamepitaxyrare-earthintercalationcompounds
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

Ultrathin samarium carbide (SmC6) films, grown here by molecular beam epitaxy on graphene-terminated SiC, show a valence-band splitting of up to 0.16 eV when cooled below about 90 K. The paper attributes this splitting to ferromagnetic order of trivalent samarium 4f moments coupled to conduction electrons, rather than to quantum well states, density waves, electron–boson coupling, or altermagnetism. The significance is that a 4f-electron two-dimensional magnet is being probed spectroscopically, and that Sm—despite its small effective moment of 0.84 Bohr magneton—produces an exchange splitting comparable to Eu- and Gd-based magnets. The same split appears in a surface state, but it survives surface reconstruction, so the proposed magnetic order is robust.

What carries the argument

The central mechanism is the exchange coupling $J$ between localized Sm $4f$ moments and conduction electrons. In the paper's picture, conduction-electron-mediated RKKY interactions order the Sm$^{3+}$ moments ferromagnetically below about 90 K; the ordered moments then act back on the conduction bands, producing a Zeeman-type spin splitting whose size is set by $J$ times the ordered moment. The measured quantity carrying the argument is the temperature-dependent ARPES band splitting, whose mean-field-like onset near 90 K and momentum-space isotropy are read as the fingerprint of the ferromagnetic transition.

What would settle it

Perform magnetometry or magnetic circular dichroism on the same films, or spin-resolved photoemission on the split bands: if no spontaneous moment appears below about 90 K, or if the two split bands are not oppositely spin-polarized, the ferromagnetic attribution is disproved.

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Extended reading notes

Core claim

The paper claims that, below roughly 90 K, the conduction-electron bands of ultrathin SmC6 undergo a Zeeman-type splitting of up to 0.16 eV that is isotropic in momentum space and grows with decreasing temperature in a mean-field-like way. It identifies this splitting as the spectroscopic signature of ferromagnetic order of Sm$^{3+}$ moments, formed through RKKY exchange mediated by the conduction electrons, with the ordered moments then splitting the bands via a strong $4f$–conduction exchange coupling $J$. The gradual temperature evolution and the isotropy of the splitting are used to rule out quantum well states, charge/spin density waves, electron–boson coupling satellites, and altermagnetic splittings. Because Sm's ordered moment is only about 0.84 $\mu_B$, a splitting as large as those in Eu- and Gd-based systems implies an unusually large $J$ in this material.

Load-bearing premise

The entire magnetic interpretation rests on the load-bearing premise that the observed 0.16 eV splitting is a ferromagnetic exchange splitting; there is no independent magnetization or spin-resolved measurement confirming that the films are actually ferromagnetic.

Editorial extensions

If this is right

  • Ultrathin SmC6 becomes a spectroscopic platform for two-dimensional 4f-electron magnetism, with an inferred ordering temperature near 90 K.
  • The observed splitting implies a strong 4f–conduction exchange coupling in SmC6, since Sm's ordered moment alone is too small to explain a splitting matching Eu/Gd systems.
  • Spin-resolved ARPES or magnetic DFT calculations should find opposite spin character in the split bands, providing a direct test of the magnetic origin.
  • Because the splitting survives overannealing while the surface state disappears, the proposed ferromagnetic order is not tied to a specific surface termination.
  • The mean-field-like temperature dependence of the splitting can serve as an order-parameter probe of the ferromagnetic transition in these films.

Reading between the lines

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

  • Beyond the paper, a quantitative estimate of $J$ from the 0.16 eV scale could identify other Sm-based compounds where the same strong coupling might be expected, potentially widening the search for 4f two-dimensional magnets.
  • A thickness-dependent ARPES study would be a natural extension to separate surface and bulk contributions, since the surface state splits with the same magnitude but is removed by reconstruction.
  • A spin-resolved measurement would be the decisive test separating the ferromagnetic interpretation from other ordered states that could produce the same temperature dependence and momentum isotropy.
  • The same analysis could be applied to other trivalent rare-earth graphitic intercalation compounds, where the band splitting should scale with the f-moment and exchange coupling; this is a testable prediction.
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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

3 major / 4 minor

Summary. The manuscript reports MBE growth of ultrathin SmC6 films on graphene-terminated SiC and their characterization by RHEED, STEM, XAS, and in situ ARPES. The central observation is a large band splitting of up to 0.16 eV in the valence bands below ~90 K, which develops gradually with decreasing temperature and is isotropic in momentum space. The authors attribute this splitting to ferromagnetic order of Sm 3+ 4f moments coupled to conduction electrons, and they argue that the temperature dependence and the persistence of the splitting in overannealed samples rule out alternative mechanisms such as quantum well states, density waves, electron-boson coupling, and altermagnetism. A DFT calculation treating Sm 4f as core states reproduces the high-temperature (125 K) band structure. The paper concludes that SmC6 is a 2D 4f-electron ferromagnet with an unusually large exchange splitting despite the small Sm magnetic moment.

Significance. If the ferromagnetic interpretation is correct, the work provides a rare spectroscopic view of a 4f-electron-based two-dimensional ferromagnet and reports a remarkably large exchange splitting for a small-moment system. The experimental data appear reproducible across two photon energies and multiple samples, and the temperature-dependent evolution of the splitting is documented in detail with a mean-field-like onset near 90 K. The open data deposition is a strength. The main limitation is that the magnetic origin of the splitting is inferred rather than directly measured; no magnetization, XMCD, neutron, or spin-resolved ARPES data are presented. The paper's value therefore depends on how strongly the alternative non-magnetic explanations can be excluded, and that exclusion is currently argued on the basis of the same spectroscopic observable used to infer the magnetic order.

major comments (3)
  1. [Abstract, Section III.B, and Conclusion] The paper's central claim that the band splitting arises from ferromagnetic order is not independently confirmed. The splitting is interpreted as Zeeman-type exchange splitting, but no magnetization, XMCD, neutron diffraction, or spin-resolved ARPES measurement is provided. The abstract states "we attribute to the ferromagnetic order" and the conclusion says the data imply "ferromagnetism in SmC6 thin films," whereas the evidence directly establishes only a temperature-dependent band splitting. This is a load-bearing gap because the same observable is used both to infer the magnetic order and to support the magnetic interpretation. Either direct bulk or element-specific magnetization measurements should be added, or the claims in the abstract and conclusion should be softened to explicitly present ferromagnetism as one plausible interpretation rather than an established conclusion.
  2. [Section III.B, paragraph discussing alternative explanations] The argument that the gradual temperature evolution and momentum-space isotropy rule out charge/spin density waves is not sufficient. A second-order density-wave transition also has a mean-field-like order parameter and can reconstruct an electron pocket into a small circular pocket plus a large hexagonal pocket when multiple Q-vectors are involved, which is not obviously excluded by the two Fermi surface maps in Fig. 3(e,f). No low-temperature structural characterization (e.g., LEED or RHEED at 6 K) is reported, so a subtle structural transition below 90 K is not experimentally excluded. The authors should either provide low-temperature diffraction data or substantially weaken the claim that density-wave and structural alternatives are ruled out.
  3. [Section III.B, Fig. 4(d,f)] The power-law fitting used to extract the onset temperature is under-specified. The text states that "detailed fittings using power-law relation" agree well and yield an onset temperature of ~90 K, but it does not give the functional form, the fitted exponent, or the number of free parameters. For example, is the exponent fixed to the mean-field value 1/2 or allowed to vary? Without this information, the statement that the temperature dependence is "mean-field-like" is not quantitatively substantiated. The authors should report the fitted function, the exponent, the fitted T_C with uncertainty, and show the fitting residuals or a figure with the fits overlaid on the data.
minor comments (4)
  1. [Throughout] There are several typos: "Momemtum" in the Fig. 4 caption, "T emperature" in the Section III.B heading, "opportunites" in the Introduction, and "ferromagnet order" in the Conclusion. These should be corrected.
  2. [Section II.A, XAS discussion] The XAS spectrum is described as showing a "dominant contribution from Sm3+", but no quantification or error estimate is given. Since the valence state of Sm is important for the magnetic interpretation, a more quantitative statement (e.g., estimated Sm3+ fraction) would be helpful.
  3. [Section III.B, photon-energy comparison] The paper states that the splitting is similar at 21.2 eV and 40.8 eV and therefore intrinsic, but Fig. 3(b,d) show that the 40.8 eV data are dominated by surface contributions. The disentangling of bulk and surface contributions at 40.8 eV is not fully explained; a brief clarification of how the bulk-derived splitting was identified in the 40.8 eV spectra would strengthen this point.
  4. [Section III.B, large-exchange inference] The inference that the large splitting implies a large exchange coupling J between Sm 4f and conduction electrons is plausible but purely qualitative. A simple mean-field estimate using the known Sm3+ moment (0.84 uB) and the observed splitting would make this more concrete and would also clarify whether the splitting magnitude is consistent with any reasonable J value.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity: the band splitting is a directly measured ARPES observable, and the ferromagnetic attribution rests on external anchors (XAS, DFT, known Sm ferromagnets) rather than on a quantity defined by the claim.

full rationale

The paper's central observable — the up-to-0.16 eV valence-band splitting — is a directly measured ARPES quantity, not a parameter fitted from the hypothesis it is used to support. The attribution to ferromagnetic exchange splitting is an interpretation anchored by external evidence: XAS identifies Sm3+ (Fig. 1(e), refs [32,33]), DFT with localized 4f core electrons reproduces the 125 K bands, and the splitting's isotropic, Zeeman-like character plus its mean-field temperature evolution are compared against known Sm-based ferromagnets and against alternative mechanisms (quantum well states, CDW/SDW, electron-boson satellites, altermagnetism). Extracting an onset temperature ~90 K from the same splitting's power-law fit is standard order-parameter characterization, not a prediction of an independent quantity from the same input, and the paper does not present T_C as independent of the splitting. The absence of magnetization or spin-resolved ARPES is an evidential limitation for the magnetic interpretation, but it does not make the derivation circular. The only overlapping-author citation (ref [33]) supports the Sm3+ XAS assignment alongside an external standard (ref [32]) and is not load-bearing. No step in the paper reduces by construction to its own inputs, so circularity score is 0.

Assumptions & free parameters 2 free parameters · 5 assumptions · 0 invented entities

The central claim rests on fitting the splitting onset temperature, a pseudopotential choice that fixes the valence, and the assumption that no other many-body instability produces the same signature. No new particles or entities are introduced.

free parameters (2)
  • Critical temperature T_C = ~90 K
    Extracted from power-law fit to the temperature-dependent band splitting (Fig. 4d,f). Used to identify the onset of ferromagnetic order.
  • Inner potential V0 = 22.9 eV
    Chosen so that the DFT band structure at kz=pi/c matches ARPES data (Section III.B). This aligns the calculated and measured dispersions but is a tuning parameter.
assumptions (5)
  • domain assumption Sm is trivalent (Sm3+) in the films, giving a J=5/2 local moment of ~0.84 mu_B.
    Based on XAS at the Sm M edge (Fig. 1e), which shows predominantly Sm3+. This underpins the magnetic ordering scenario.
  • domain assumption DFT with 4f electrons in the core accurately represents the high-temperature paramagnetic electronic structure.
    The 'Sm 3' pseudopotential treats 4f as core, ignoring their itinerancy. The agreement at 125 K supports this approximation but it is an assumption.
  • domain assumption Band splitting is a Zeeman-type exchange splitting proportional to the local moment times exchange coupling J.
    Invoked in Section III.B with reference [44], used to interpret the observed splitting as magnetic.
  • domain assumption RKKY interaction between Sm 4f moments mediated by conduction electrons gives ferromagnetic order.
    Standard mechanism for rare-earth intermetallic magnets; referenced in the text but not independently established for SmC6.
  • domain assumption Other mechanisms (quantum well states, CDW/SDW, electron-boson coupling, altermagnetism) would produce different temperature or momentum signatures and are excluded.
    The authors rule out alternatives based on the gradual, isotropic splitting, but no quantitative modeling of these alternatives is given.

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Cite this review

Pith. "Pith review of Large ferromagnetic-like band splitting in ultrathin ${\mathrm{SmC}}_{6}$ films." pith.science (2026). https://pith.science/paper/VNUIBF7K

@misc{pith2026250711396,
  author       = {Pith},
  title        = {Pith review of: Large ferromagnetic-like band splitting in ultrathin $\mathrmSmC_6$ films},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/VNUIBF7K}},
  note         = {Machine review of arXiv:2507.11396}
}
abstract

Two-dimensional (2D) magnetic materials provide a unique platform for exploring quantum phases from magnetic order in reduced dimensions. While there have been extensive studies on 2D magnetic materials based on 3$d$ electrons, experimental studies on 4$f$-electron counterparts are far fewer, particularly on their electronic structure. In this study, we report the successful synthesis of ultrathin ${\mathrm{SmC}}_{6}$ films using molecular beam epitaxy. Utilizing in situ angle-resolved photoemission spectroscopy (ARPES), we uncover a large band splitting in the valence bands, which we attribute to the ferromagnetic order driven by exchange couplings between Sm 4$f$ moments and conduction electrons. Despite the small magnetic moment of Sm, the observed splitting is comparable to those of Eu- and Gd-based systems with much larger local moments. Interestingly, the surface state also exhibits splitting with similar magnitude and can be eliminated by overannealing, while the valence bands with ferromagnetic-like splittings remain robust. Our work provides spectroscopic insight to understand the electronic origin of magnetic order in Sm-based compounds. Our study also offers a platform to study 2D magnetic materials based on 4$f$ electrons.

Figures

Figures reproduced from arXiv: 2507.11396 by the authors.

Figure 1
Figure 1. FIG. 1. Growth and characterization of SmC [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. (a) shows the ARPES spectrum at 125 K taken with 21.2 eV photons, and [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. FIG. 3. Temperature-dependent band structure of SmC [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figures from the paper (2 more)
Figure 4
Figure 4. Figure 4: FIG. 4. Detailed temperature evolution of valence bands near [PITH_FULL_IMAGE:figures/full_fig_p005_4.png]
Figure 5
Figure 5. Figure 5: FIG. 5. Electronic structure of overannealed SmC [PITH_FULL_IMAGE:figures/full_fig_p006_5.png]

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Works this paper leans on

45 extracted references · 38 canonical work pages

  1. [1]

    K. S. Burch, D. Mandrus, and J.-G. Park, Magnetism in two-dimensional van der Waals materials, Nature 563, 47 (2018)

    2018

  2. [2]

    Gong and X

    C. Gong and X. Zhang, Two-dimensional magnetic crys- tals and emergent heterostructure devices, Science 363, eaav4450 (2019)

    2019

  3. [3]

    C. Gong, L. Li, Z. Li, H. Ji, A. Stern, Y. Xia, T. Cao, W. Bao, C. Wang, Y. Wang, et al., Discovery of intrinsic ferromagnetism in two-dimensional van der Waals crys- tals, Nature 546, 265 (2017)

    work page 2017

  4. [4]

    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, et al., Layer-dependent ferro- magnetism in a van der Waals crystal down to the mono- layer limit, Nature 546, 270 (2017)

    work page 2017

  5. [5]

    Bonilla, S

    M. Bonilla, S. Kolekar, Y. Ma, H. C. Diaz, V. Kalappat- til, R. Das, T. Eggers, H. R. Gutierrez, M.-H. Phan, and M. Batzill, Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates, Nat. Nan- otechnol. 13, 289 (2018)

    work page 2018

  6. [6]

    Y. Deng, Y. Yu, Y. Song, J. Zhang, N. Z. Wang, Z. Sun, Y. Yi, Y. Z. Wu, S. Wu, J. Zhu, et al., Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2, Nature 563, 94 (2018)

    work page 2018

  7. [7]

    Huang, G

    B. Huang, G. Clark, D. R. Klein, D. MacNeill, E. Navarro-Moratalla, K. L. Seyler, N. Wilson, M. A. McGuire, D. H. Cobden, D. Xiao, et al., Electrical con- trol of 2D magnetism in bilayer GrI 3, Nat. Nanotechnol. 13, 544 (2018)

    work page 2018

  8. [8]

    Y. Ma, Y. Dai, M. Guo, C. Niu, Y. Zhu, and B. Huang, Evidence of the existence of magnetism in pristine VX 2 monolayers (X= S, Se) and their strain-induced tunable magnetic properties, ACS nano 6, 1695 (2012)

    work page 2012

Show all 45 references
  1. [9]

    X. Hu, Y. Zhao, X. Shen, A. V. Krasheninnikov, Z. Chen, and L. Sun, Enhanced ferromagnetism and tunable mag- netism in Fe 3GeTe2 monolayer by strain engineering, ACS Appl. Mater. Interfaces 12, 26367 (2020)

    2020

  2. [10]

    Zhong, C

    Y. Zhong, C. Peng, H. Huang, D. Guan, J. Hwang, K. H. Hsu, Y. Hu, C. Jia, B. Moritz, D. Lu, et al., From Stoner to local moment magnetism in atomically thin GrTe 2, Nat. Commun. 14, 5340 (2023)

    2023

  3. [11]

    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, et al., Room-temperature intrinsic ferromagnetism in epitaxial GrTe2 ultrathin films, Nat. Commun. 12, 2492 (2021)

    2021

  4. [12]

    Jiang, Q

    X. Jiang, Q. Liu, J. Xing, N. Liu, Y. Guo, Z. Liu, and J. Zhao, Recent progress on 2D magnets: Fundamen- tal mechanism, structural design and modification, Appl. Phys. Rev. 8, 031305 (2021)

    2021

  5. [13]

    A. M. Tokmachev, D. V. Averyanov, O. E. Parfenov, A. N. Taldenkov, I. A. Karateev, I. S. Sokolov, O. A. Kon- dratev, and V. G. Storchak, Emerging two-dimensional ferromagnetism in silicene materials, Nat. Commun. 9, 1672 (2018)

    2018

  6. [14]

    V. A. Posey, S. Turkel, M. Rezaee, A. Devarakonda, A. K. Kundu, C. S. Ong, M. Thinel, D. G. Chica, R. A. Vi- talone, R. Jing, et al., Two-dimensional heavy fermions in the van der Waals metal CeSiI, Nature 625, 483 (2024)

    2024

  7. [15]

    Varma, Mixed-valence compounds, Rev

    C. Varma, Mixed-valence compounds, Rev. Mod. Phys. 48, 219 (1976)

    1976

  8. [16]

    Higashinaka, A

    R. Higashinaka, A. Yamada, T. D. Matsuda, and Y. Aoki, Relationship between specific heat, valence and effective magnetic moment of Sm ions in strongly correlated Sm compounds, AIP Advances 8, 125017 (2018)

    2018

  9. [17]

    Dzero, K

    M. Dzero, K. Sun, V. Galitski, and P. Coleman, Topo- logical Kondo Insulators, Phys. Rev. Lett. 104, 106408 (2010)

    2010

  10. [18]

    L. Li, K. Sun, C. Kurdak, and J. Allen, Emergent mys- tery in the Kondo insulator samarium hexaboride, Nat. Rev. Phys. 2, 463 (2020)

    2020

  11. [19]

    Adachi and H

    H. Adachi and H. Ino, A ferromagnet having no net mag- netic moment, Nature 401, 148 (1999)

    1999

  12. [20]

    C.-J. Kang, H. C. Choi, K. Kim, and B. Min, Topologi- cal properties and the dynamical crossover from mixed- valence to kondo-lattice behavior in the golden phase of SmS, Phys. Rev. Lett. 114, 166404 (2015)

    2015

  13. [21]

    J. D. Denlinger, J. W. Allen, J.-S. Kang, K. Sun, B.-I. Min, D.-J. Kim, and Z. Fisk, SmB 6 photoemission: Past and present, J. Phys. Soc. Jpn. Conf. Proc. 3, 017038 (2014). 8

    2014

  14. [22]

    Neupane, N

    M. Neupane, N. Alidoust, S. Xu, T. Kondo, Y. Ishida, D.- J. Kim, C. Liu, I. Belopolski, Y. Jo, T.-R. Chang, et al., Surface electronic structure of the topological Kondo- insulator candidate correlated electron system SmB 6, Nat. Commun. 4, 2991 (2013)

    2013

  15. [23]

    Jiang, S

    J. Jiang, S. Li, T. Zhang, Z. Sun, F. Chen, Z. R. Ye, M. Xu, Q. Q. Ge, S. Y. Tan, X. H. Niu, M. Xia, B. P. Xie, Y. F. Li, X. H. Chen, H. H. Wen, and D. L. Feng, Obser- vation of possible topological in-gap surface states in the Kondo insulator SmB6 by photoemission, Nat. Commu...

    2013

  16. [24]

    N. Xu, C. E. Matt, E. Pomjakushina, X. Shi, R. S. Dhaka, N. C. Plumb, M. Radovi´ c, P. K. Biswas, D. Evtushinsky, V. Zabolotnyy, et al., Exotic Kondo crossover in a wide temperature region in the topological Kondo insulator SmB6 revealed by high-resolution ARPES, Phys. Rev. B ...

    2014

  17. [25]

    L. Lang, S. Doyen-Lang, A. Charlier, and M. Charlier, Dynamical study of graphite and graphite intercalation compounds, Phys. Rev. B 49, 5672 (1994)

    1994

  18. [26]

    Zhu, J.-F

    F.-Y. Zhu, J.-F. Cao, X.-Y. Meng, J.-Q. Li, R. Yu, Y.-M. Wang, S. Qiao, B. Zhao, M.-Z. Zhang, Z.-K. Liu, et al., Spatial-and spin-resolution ARPES and mag- netism beamline at SSRF, Nucl. Sci. and Tech. 35, 130 (2024)

    2024

  19. [27]

    Kresse and J

    G. Kresse and J. Hafner, Ab initio molecular dynamics for liquid metals, Phys. Rev. B 47, 558 (1993)

    1993

  20. [28]

    Kresse and D

    G. Kresse and D. Joubert, From ultrasoft pseudopoten- tials to the projector augmented-wave method, Phys. Rev. B 59, 1758 (1999)

    1999

  21. [29]

    J. P. Perdew, K. Burke, and M. Ernzerhof, Generalized gradient approximation made simple, Phys. Rev. Lett. 77, 3865 (1996)

    1996

  22. [30]

    Stenborg, J

    A. Stenborg, J. Andersen, O. Bj¨ orneholm, A. Nilsson, and N. M ˚ artensson, Valence-transition-induced 5×5 sur- face reconstruction of Sm(0001), Phys. Rev. Lett.63, 187 (1989)

    1989

  23. [31]

    Lundgren, J

    E. Lundgren, J. N. Andersen, R. Nyholm, X. Torrelles, J. Rius, A. Delin, A. Grechnev, O. Eriksson, C. Konvicka, M. Schmid, et al., Geometry of the valence transition induced surface reconstruction of Sm (0001), Phys. Rev. Lett. 88, 136102 (2002)

    2002

  24. [32]

    Kaindl, G

    G. Kaindl, G. Kalkowski, W. Brewer, B. Perscheid, and F. Holtzberg, M-edge x-ray absorption spectroscopy of 4f instabilities in rare-earth systems, J. Appl. Phys. 55, 1910 (1984)

    1984

  25. [33]

    Zheng, Z

    H. Zheng, Z. Xiao, Z. Pan, G. Yang, Y. Wu, T. Hua, J. Zhang, J. Lu, J. Li, T. Sun, et al., 3d flat bands and coupled 4 f moments in the kagome-honeycomb perma- nent magnet Sm 2Co17, arXiv preprint arXiv:2503.12890 (2025)

    2025 arXiv

  26. [34]

    Chikina, A

    A. Chikina, A. Generalov, K. Kummer, M. G¨ uttler, V. Antonov, Y. Kucherenko, K. Kliemt, C. Krellner, S. Danzenb¨ acher, T. Kim,et al., Valence instability in the bulk and at the surface of the antiferromagnet SmRh2Si2, Phys. Rev. B 95, 155127 (2017)

    2017

  27. [35]

    Adachi, H

    H. Adachi, H. Ino, and H. Miwa, Separation of the 4 f - spin, 4 f -orbital, and conduction-electron magnetization from exotic thermomagnetic behavior for ferromagnetic Sm intermetallics, Phys. Rev. B 59, 11445 (1999)

    1999

  28. [36]

    Chiang, Photoemission studies of quantum well states in thin films, Surf

    T.-C. Chiang, Photoemission studies of quantum well states in thin films, Surf. Sci. Rep. 39, 181 (2000)

    2000

  29. [37]

    J. J. Lee, F. T. Schmitt, R. G. Moore, S. Johnston, Y.-T. Cui, W. Li, M. Yi, Z. K. Liu, M. Hashimoto, Y. Zhang, D. H. Lu, T. P. Devereaux, D.-H. Lee, and Z.-X. Shen, Interfacial mode coupling as the origin of the enhance- ment of Tc in FeSe films on SrTiO 3, Nature 515, 245 (2014)

    2014

  30. [38]

    ˇSmejkal, J

    L. ˇSmejkal, J. Sinova, and T. Jungwirth, Emerging Re- search Landscape of Altermagnetism, Phys. Rev. X 12, 040501 (2022)

    2022

  31. [39]

    L. Bai, W. Feng, S. Liu, L. ˇSmejkal, Y. Mokrousov, and Y. Yao, Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics, Adv. Funct. Mater. 34, 2409327 (2024)

    2024

  32. [40]

    C. Song, H. Bai, Z. Zhou, L. Han, H. Reichlova, J. H. Dil, J. Liu, X. Chen, and F. Pan, Altermagnets as a new class of functional materials, Nat. Rev. Mater. (2025)

    2025

  33. [41]

    Chikina, M

    A. Chikina, M. H¨ oppner, S. Seiro, K. Kummer, S. Danzenb¨ acher, S. Patil, A. Generalov, M. G¨ uttler, Y. Kucherenko, E. V. Chulkov, et al., Strong ferromag- netism at the surface of an antiferromagnet caused by buried magnetic moments, Nat. Commun.5, 3171 (2014)

    2014

  34. [42]

    G¨ uttler, A

    M. G¨ uttler, A. Generalov, M. Otrokov, K. Kummer, K. Kliemt, A. Fedorov, A. Chikina, S. Danzenb¨ acher, S. Schulz, E. V. Chulkov, et al., Robust and tunable itin- erant ferromagnetism at the silicon surface of the anti- ferromagnet GdRh2Si2, Sci. Rep. 6, 24254 (2016)

    2016

  35. [43]

    Zhang, F

    H. Zhang, F. Du, X. Zheng, S. Luo, Y. Wu, H. Zheng, S. Cui, Z. Sun, Z. Liu, D. Shen, et al., Electronic band reconstruction across the insulator-metal transition in colossally magnetoresistive EuCd2P2, Phys. Rev. B 108, L241115 (2023)

    2023

  36. [44]

    Jensen and A

    J. Jensen and A. R. Mackintosh, Rare earth mag- netism: structures and excitations (Oxford University Press, 1991)

    1991

  37. [45]

    Zheng, Y

    H. Zheng, Y. Xu, G. Yang, Z. Pan, Y. Wu, Y. Zheng, T. Sun, J. Cao, Y. Yang, M. Shi, C. Cao, and Y. Liu, Raw datasets for ”Large ferromagnetic-like band splitting in ultrathin SmC 6 films”, Figshare repository https:// doi.org/10.6084/m9.figshare.29321216

    doi

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Reviewed August 6, 2026 · model on record in the stance chip above.