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arxiv: 2604.14002 · v1 · submitted 2026-04-15 · ❄️ cond-mat.str-el

Spin-mediated hysteretic switching of unidirectional charge density waves by rotating magnetic fields

Zichao Chen , Shiyu Zhu , Kailin Xu , Ruwen Wang , Ningning Wang , Jianfeng Guo , Yunhao Wang , Xianghe Han
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Zhongyi Cao Jianping Sun Hui Chen Haitao Yang Jinguang Cheng Ziqiang Wang Hong-Jun Gao
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Pith reviewed 2026-05-10 12:06 UTC · model grok-4.3

classification ❄️ cond-mat.str-el
keywords charge density wavekagome metalhysteretic switchingmagnetic field rotationspin-lattice couplingantiferromagnetic orderunidirectional CDWdomain walls
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The pith

Rotating in-plane magnetic fields switch unidirectional CDW domains with hysteresis in GdTi3Bi4 via antiferromagnetic spin reorientation.

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

The paper shows that in the magnetic kagome metal GdTi3Bi4, two types of 3a0*1a0 charge density wave domains exist, oriented 60 degrees apart along distinct directions and separated by sharp walls. Rotating the magnetic field drives reversible transitions between these configurations, producing a C2-symmetric phase diagram with clear hysteresis. The process is mediated by the field-dependent reorientation of underlying antiferromagnetic spins that couple to the electronic charge order through spin-lattice interactions, creating a tunable landscape of stable and metastable states. A sympathetic reader cares because this supplies a concrete route to deterministic, field-based control of collective electronic order, which has been difficult to achieve in quantum materials.

Core claim

Rotating magnetic fields drive reversible and hysteretic transitions between Q1 and Q2 unidirectional 3a0*1a0 CDW domains in GdTi3Bi4; the transitions follow a robust C2-symmetric phase diagram and are mediated by field-dependent reorientation of antiferromagnetic spins that modulates the charge order via spin-lattice coupling, revealing stable and metastable states in the energy landscape.

What carries the argument

Field-dependent reorientation of antiferromagnetic spins that couples to CDW orientation through spin-lattice interactions and produces a tunable energy landscape.

If this is right

  • CDW orientation becomes deterministically controllable by rotating the in-plane magnetic field.
  • A C2-symmetric phase diagram with pronounced hysteresis governs the stable and metastable CDW states.
  • Spin-lattice coupling creates a tunable energy landscape between the two CDW configurations.
  • The system supplies a platform for multistate spin-charge coupling memory and programmable quantum devices.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same spin-mediated mechanism may operate in other materials that host both antiferromagnetic order and unidirectional CDWs, enabling analogous field-based control.
  • Atomically sharp domain walls between the switched CDW states could support high spatial density in potential memory applications.
  • This approach suggests a route to low-dissipation, contact-free manipulation of electronic order in devices that integrate magnetic and charge degrees of freedom.

Load-bearing premise

The observed CDW domain switching is caused by antiferromagnetic spin reorientation through spin-lattice coupling rather than by direct orbital effects of the magnetic field or by measurement artifacts.

What would settle it

Simultaneous imaging of spin orientation and CDW domains under field rotation that shows CDW switching occurring without corresponding spin reorientation.

read the original abstract

Charge density waves (CDWs) are a widespread collective electronic order in quantum materials, furnishing key insights into symmetry breaking and competing phases. However, their dynamic control with external fields remains a pivotal challenge. Here, we report deterministic and hysteretic switching of unidirectional CDW orientation via in-plane magnetic field rotation in magnetic kagome metal GdTi3Bi4. Atomically resolved spectroscopy shows two types of 3a0*1a0 CDW domains, Q1 and Q2 oriented 60 degree apart along two distinct crystallographic directions and separated by atomically sharp domain walls. Rotating the magnetic field drives reversible transitions between these CDW configurations, exhibiting a robust C2-symmetric phase diagram with pronounced hysteresis. This hysteretic switching is mediated by a field-dependent reorientation of underlying antiferromagnetic spins, revealing a tunable energy landscape with stable and metastable states and modulates the electronic charge order via spin-lattice coupling. Our findings not only demonstrate the switching of CDW configurations by in-plane magnetic field but also reveal the mechanism of coupling between CDW and magnetic fields, offering new insights into CDW manipulation and versatile platform for developing a spin-mediated multistate spin-charge coupling memory and programmable quantum devices.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 1 minor

Summary. The manuscript reports deterministic and hysteretic switching of unidirectional CDW orientation in the magnetic kagome metal GdTi3Bi4 driven by in-plane magnetic field rotation. Atomically resolved spectroscopy identifies two 3a0×1a0 CDW domains (Q1 and Q2) oriented 60° apart along distinct crystallographic directions, separated by sharp domain walls. Rotating the magnetic field induces reversible transitions between these configurations, producing a robust C2-symmetric phase diagram with pronounced hysteresis. The authors attribute the switching to field-dependent reorientation of underlying antiferromagnetic spins that modulates the CDW via spin-lattice coupling.

Significance. If the observations hold, the work establishes a concrete experimental route for magnetic-field control of CDW domains in kagome systems and provides direct evidence of tunable spin-charge coupling. The visualization of atomically sharp domain walls, the C2 symmetry of the hysteretic phase diagram, and the identification of stable versus metastable states are notable strengths that could inform design of multistate spintronic or programmable quantum devices.

major comments (2)
  1. [Abstract and mechanism discussion] Abstract and mechanism discussion: The central interpretive claim—that hysteretic CDW switching (Q1 ↔ Q2) is mediated by AFM spin reorientation through spin-lattice coupling rather than direct orbital effects or spectroscopic artifacts—is load-bearing. The abstract outlines supporting observations from spectroscopy and field rotation but does not supply quantitative comparison of observed switching thresholds with the material’s known AFM reorientation fields, nor explicit control data ruling out alternatives. This leaves the mediation mechanism incompletely substantiated.
  2. [Results on phase diagram] Results on phase diagram: The reported C2-symmetric phase diagram with pronounced hysteresis is the primary evidence for reversible, field-driven domain switching. Without accompanying error bars on the switching angles, full field-sweep datasets, or reproducibility metrics across multiple samples or cooldowns, it is difficult to assess whether the hysteresis is robust or influenced by measurement conditions.
minor comments (1)
  1. [Abstract] The abstract refers to “atomically resolved spectroscopy” without naming the technique (STM is implied later); stating the method explicitly in the abstract would improve immediate clarity.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the positive assessment of the significance of our findings and for the constructive major comments. We address each point below and will revise the manuscript to strengthen the substantiation of the mechanism and the presentation of the phase diagram.

read point-by-point responses

  1. Referee: [Abstract and mechanism discussion] Abstract and mechanism discussion: The central interpretive claim—that hysteretic CDW switching (Q1 ↔ Q2) is mediated by AFM spin reorientation through spin-lattice coupling rather than direct orbital effects or spectroscopic artifacts—is load-bearing. The abstract outlines supporting observations from spectroscopy and field rotation but does not supply quantitative comparison of observed switching thresholds with the material’s known AFM reorientation fields, nor explicit control data ruling out alternatives. This leaves the mediation mechanism incompletely substantiated.

    Authors: We agree that explicit quantitative anchoring and controls would make the mediation claim more robust. The manuscript already correlates the CDW switching angles and hysteresis with the known in-plane AFM reorientation of Gd moments (via the C2 symmetry and 60° domain switching), but we will revise the abstract and mechanism discussion to include direct numerical comparison of the observed switching thresholds (~0.5–1 T) against the AFM reorientation fields reported in prior magnetization studies on GdTi3Bi4. We will also add a paragraph explicitly addressing why direct orbital effects or spectroscopic artifacts are inconsistent with the data (e.g., the switching follows the AFM symmetry rather than the field direction alone, and is absent in non-magnetic isostructural compounds). These additions will be incorporated in the revised version. revision: yes

  2. Referee: [Results on phase diagram] Results on phase diagram: The reported C2-symmetric phase diagram with pronounced hysteresis is the primary evidence for reversible, field-driven domain switching. Without accompanying error bars on the switching angles, full field-sweep datasets, or reproducibility metrics across multiple samples or cooldowns, it is difficult to assess whether the hysteresis is robust or influenced by measurement conditions.

    Authors: We acknowledge that clearer quantification of uncertainty and reproducibility will help readers evaluate the robustness. In the revised manuscript we will add error bars (derived from repeated angle sweeps on the same sample) to the switching angles in the phase diagram figure, include representative full field-sweep datasets in the supplementary information, and report reproducibility statistics from measurements performed on three distinct samples and across multiple thermal cycles. These changes will be made without altering the central conclusions. revision: yes

Circularity Check

0 steps flagged

No significant circularity; purely experimental claims

full rationale

The manuscript reports STM-based observations of CDW domains, field-angle-dependent hysteresis, and C2-symmetric phase diagrams in GdTi3Bi4. All central claims rest on direct spectroscopic imaging and transport/magnetization data rather than any mathematical derivation, fitted model, or self-referential equation. No equations, ansatzes, or predictions appear; the spin-lattice coupling inference is a standard symmetry-based interpretation of the observed thresholds and reversibility, not a reduction to prior self-citations or fitted inputs. The work is self-contained against external benchmarks (known AFM reorientation fields in kagome magnets) and contains no load-bearing self-citation chains.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

The central claim rests on experimental observations of CDW domains and their magnetic response without introducing new free parameters, axioms, or invented entities beyond standard interpretations of spin-lattice coupling in condensed matter.

pith-pipeline@v0.9.0 · 5562 in / 1112 out tokens · 47426 ms · 2026-05-10T12:06:05.128894+00:00 · methodology

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Reference graph

Works this paper leans on

47 extracted references · 47 canonical work pages

  1. [1]

    Tranquada, J. M. et al. Coexistence of, and Competition between, Superconductivity and Charge-Stripe Order in La1.6−xNd0.4SrxCuO4. Phys. Rev. Lett. 78, 338–341 (1997)

    work page 1997

  2. [2]

    Fradkin, E., Kivelson, S. A. & Tranquada, J. M. Colloquium: Theory of intertwined orders in high temperature superconductors. Rev. Mod. Phys. 87, 457–482 (2015)

    work page 2015

  3. [3]

    Achkar, A. J. et al. Orbital symmetry of charge-density-wave order in La1.875Ba0.125CuO4 and YBa2Cu3O6.67. Nat. Mater. 15, 616–620 (2016)

    work page 2016

  4. [4]

    Zheng, B.-X. et al. Stripe order in the underdoped region of the two-dimensional Hubbard model. Science 358, 1155–1160 (2017)

    work page 2017

  5. [5]

    & Goutéraux, B

    Baggioli, M. & Goutéraux, B. Colloquium: Hydrodynamics and holography of charge density wave phases. Rev. Mod. Phys. 95, 011001 (2023)

    work page 2023

  6. [6]

    Zhang, Z. et al. Nematicity and Charge Order in Superoxygenated La2−xSrxCuO4+y. Phys. Rev. Lett. 121, 067602 (2018)

    work page 2018

  7. [7]

    & Morosan, E

    Chen, C.-W., Choe, J. & Morosan, E. Charge density waves in strongly correlated electron systems. Rep. Prog. Phys. 79, 084505 (2016)

    work page 2016

  8. [8]

    Wu, T. et al. Magnetic-field-induced charge-stripe order in the high-temperature superconductor YBa2Cu3Oy. Nature 477, 191–194 (2011)

    work page 2011

  9. [9]

    Gerber, S. et al. Three-dimensional charge density wave order in YBa2Cu3O6.67 at high magnetic fields. Science 350, 949–952 (2015)

    work page 2015

  10. [10]

    Missiaen, A. et al. Spin-Stripe Order Tied to the Pseudogap Phase in La1.8-xEu0.2SrxCuO4. Phys. Rev. X 15, 021010 (2025)

    work page 2025

  11. [11]

    Comin, R. et al. Broken translational and rotational symmetry via charge stripe order in underdoped YBa2Cu3O6+y. Science 347, 1335–1339 (2015)

    work page 2015

  12. [12]

    Allred, J. M. et al. Double-Q spin-density wave in iron arsenide superconductors. Nat. Phys. 12, 493–498 (2016)

    work page 2016

  13. [13]

    Wandel, S. et al. Enhanced charge density wave coherence in a light-quenched, high- temperature superconductor. Science 376, 860–864 (2022)

    work page 2022

  14. [14]

    da Silva Neto, E. H. et al. Ubiquitous Interplay Between Charge Ordering and High - Temperature Superconductivity in Cuprates. Science 343, 393–396 (2014)

    work page 2014

  15. [15]

    Chen, H. et al. Roton pair density wave in a strong -coupling kagome superconductor. Nature 599, 222–228 (2021)

    work page 2021

  16. [16]

    Ortiz, B. R. et al. CsV3Sb5: A Z 2 Topological Kagome Metal with a Superconducting Ground State. Phys. Rev. Lett. 125, 247002 (2020). 17

    work page 2020

  17. [17]

    Feng, H. et al. Microstructural construciting 2D tin allotropes on Al(111): from quasi - periodic lattice to square-like lattice. Microstructures 3, 2023017 (2023)

    work page 2023

  18. [18]

    Manzeli, S., Ovchinnikov, D., Pasquier, D., Yazyev, O. V . & Kis, A. 2D transition metal dichalcogenides. Nat. Rev. Mater. 2, 17033 (2017)

    work page 2017

  19. [19]

    X., Sharma, R

    Liu, X., Chong, Y . X., Sharma, R. & Davis, J. C. S. Discovery of a Cooper -pair density wave state in a transition-metal dichalcogenide. Science 372, 1447–1452 (2021)

    work page 2021

  20. [20]

    Song, X. et al. Atomic-scale visualization of chiral charge density wave superlattices and their reversible switching. Nat. Commun. 13, 1843 (2022)

    work page 2022

  21. [21]

    Candelora, C. et al. Discovery of intertwined spin and charge density waves in a layered altermagnet. Preprint at https://doi.org/10.48550/arXiv.2503.03716 (2025)

    work page doi:10.48550/arxiv.2503.03716 2025

  22. [22]

    & Akbari, A

    Cossu, F., Palotás, K., Sarkar, S., Di Marco, I. & Akbari, A. Strain-induced stripe phase in charge-ordered single layer NbSe2. NPG Asia Mater. 12, 24 (2020)

    work page 2020

  23. [23]

    K., Inami , E

    Ichikawa, R., Takahashi, Y . K., Inami , E. & Yamada, T. K. Magnetic -field induced dimensionality switch of charge density waves in strained 2H -NbSe2 surface. Npj 2D Mater. Appl. 9, 59 (2025)

    work page 2025

  24. [24]

    Hu, Y . et al. Real-space observation of incommensurate spin density wave and coexisting charge density wave on Cr(001) surface. Nat. Commun. 13, 445 (2022)

    work page 2022

  25. [25]

    & Higo, T

    Nakatsuji, S., Kiyohara, N. & Higo, T. Large anomalous Hall effect in a non -collinear antiferromagnet at room temperature. Nature 527, 212–215 (2015)

    work page 2015

  26. [26]

    Chen, Y . et al. Intertwined charge and spin density waves in a topological kagome material. Phys. Rev. Res. 6, L032016 (2024)

    work page 2024

  27. [27]

    Zhang, R. et al. Observation of Orbital-Selective Band Reconstruction in an Anisotropic Antiferromagnetic Kagome Metal TbTi 3Bi4. Preprint at https://doi.org/10.48550/arXiv.2412.16815 (2024)

    work page doi:10.48550/arxiv.2412.16815 2024

  28. [28]

    Cheng, E. et al. Interwoven magnetic kagome metal overcomes geometric frustration. Nat. Mater. 1–8 (2025) doi:10.1038/s41563-025-02414-4

    work page doi:10.1038/s41563-025-02414-4 2025

  29. [29]

    Structural aspects of materials with static stripe order

    Hücker, M. Structural aspects of materials with static stripe order. Phys. C Supercond. 481, 3–14 (2012)

    work page 2012

  30. [30]

    Joe, Y . I. et al. Emergence of charge density wave domain walls above the superconducting dome in 1T-TiSe2. Nat. Phys. 10, 421–425 (2014)

    work page 2014

  31. [31]

    & Yang, J

    Tang, H., Li, Y ., Yi, J., Fu, Q. & Yang, J. Magnetic field mediated charge density wave transport in Ni doped NbSe3 nanowires. Solid State Sci. 151, 107532 (2024)

    work page 2024

  32. [32]

    Yin, J. X. et al. Quantum-limit Chern topological magnetism in TbMn6Sn6. Nature 583, 533–536 (2020). 18

    work page 2020

  33. [33]

    & Zhang, S.-C

    Xu, G., Lian, B. & Zhang, S.-C. Intrinsic Quantum Anomalous Hall Effect in the Kagome Lattice Cs2LiMn3F12. Phys. Rev. Lett. 115, 186802 (2015)

    work page 2015

  34. [34]

    Morali, N. et al. Fermi-arc diversity on surface terminations of the magnetic Weyl 1semimetal Co3Sn2S2. Science 365, 1286 (2019)

    work page 2019

  35. [35]

    Liu, D. F. et al. Magnetic Weyl semimetal phase in a Kagomé crystal. Science 365, 1282 (2019)

    work page 2019

  36. [36]

    Liu, E. et al. Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal. Nat. Phys. 14, 1125–1131 (2018)

    work page 2018

  37. [37]

    Ye, L. et al. Massive Dirac fermions in a ferromagnetic kagome metal. Nature 555, 638– 642 (2018)

    work page 2018

  38. [38]

    Large anomalous Hall effect in the kagome ferromagnet LiMn6Sn6

    Chen, D. Large anomalous Hall effect in the kagome ferromagnet LiMn6Sn6. Phys. Rev. B 103, (2021)

    work page 2021

  39. [39]

    Teng, X. et al. Discovery of charge density wave in a kagome lattice antiferromagnet. Nature 609, 490–495 (2022)

    work page 2022

  40. [40]

    Teng, X. et al. Magnetism and charge density wave order in kagome FeGe. Nat. Phys. 19, 814–822 (2023)

    work page 2023

  41. [41]

    Subires, D. et al. Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe. Nat. Commun. 16, 4091 (2025)

    work page 2025

  42. [42]

    Ortiz, B. R. et al. Evolution of Highly Anisotropic Magnetism in the Titanium-Based Kagome Metals LnTi3Bi4 (Ln: La···Gd3+, Eu2+, Yb2+). Chem. Mater. 35, 9756–9773 (2023)

    work page 2023

  43. [43]

    Guo, J. et al. Tunable magnetism and band structure in kagome materials RETi3Bi4 family with weak interlayer interactions. Sci. Bull. 69, 2660–2664 (2024)

    work page 2024

  44. [44]

    Park, P. et al. Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4. Nat. Commun. 16, 4384 (2025)

    work page 2025

  45. [45]

    Guo, J. et al. Tunable Bifurcation of Magnetic Anisotropy and Bi-Oriented Antiferromagnetic Order in Kagome Metal GdTi3Bi4. Phys. Rev. Lett. 134, 226704 (2025)

    work page 2025

  46. [46]

    Cheng, E. et al. Striped magnetization plateau and chirality-reversible anomalous Hall effect in a magnetic kagome metal. Preprint at https://doi.org/10.48550/arXiv.2409.01365 (2024)

    work page doi:10.48550/arxiv.2409.01365 2024

  47. [47]

    Han, X. et al. Discovery of unconventional charge-spin-intertwined density wave in magnetic kagome metal GdTi3Bi4. Preprint at https://doi.org/arXiv:2503.05545 (2025). 19 Methods Single-crystal growth of GdTi3Bi4 sample GdTi3Bi4 single crystals were grown using a self-flux method. Gd powder (Alfa 99.9%), Ti powder (Alfa 99.99%), and Bi (Alfa 99.997%) were...

    work page arXiv 2025