Anomalous magnetothermoelectric behavior in massive Dirac materials

Extensive studies of electron transport in Dirac materials have shown positive magnetoresistance (MR) and positive magnetothermopower (MTP) in a magnetic field perpendicular to the excitation current or thermal gradient. In contrast, measurements of electron transport often show a negative longitudinal MR and negative MTP for a magnetic field oriented along the excitation current or thermal gradient; this is attributed to the chiral anomaly in Dirac materials. Here, we report a very different magnetothermoelectric transport behavior in the massive Dirac material ZrTe5. Although thin flakes show a commonly observed positive MR in a perpendicular magnetic field, distinct from other Dirac materials, we observe a sharp negative MTP. In a parallel magnetic field, we still observe a negative longitudinal MR, however, a remarkable positive MTP is observed for the fields parallel to the thermal gradients. Our theoretical calculations suggest that this anomalous magnetothermoelectric behavior can be attributed to the screened Coulomb scattering. This work demonstrates the significance of impurity scattering in the electron transport of topological materials and provides deep insight into the magnetotransport phenomena in Dirac materials.

Yanan Li, Huichao Wang, Jingyue Wang, Chunming Wang, Yanzhao Liu, Jun Ge, Jingjing Niu, Wenjie Zhang, Pinyuan Wang, Ran Bi, Jinglei Zhang, Ji-Yan Dai, Jiaqiang Yan, David Mandrus, Nitin Samarth, Haizhou Lu, Xiaosong Wu, and Jian Wang. (2023) Anomalous magnetothermoelectric behavior in massive Dirac materials. Phys. Rev. B 107, 085140 DOI: 10.1103/PhysRevB.107.085140

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Work Title Anomalous magnetothermoelectric behavior in massive Dirac materials
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Open Access
Creators
  1. Yanan Li
  2. Huichao Wang
  3. Jingyue Wang
  4. Chunming Wang
  5. Yanzhao Liu
  6. Jun Ge
  7. Jingjing Niu
  8. Wenjie Zhang
  9. Pinyuan Wang
  10. Ran Bi
  11. Jinglei Zhang
  12. Ji Yan Dai
  13. Jiaqiang Yan
  14. David Mandrus
  15. Nitin Samarth
  16. Haizhou Lu
  17. Xiaosong Wu
  18. Jian Wang
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Physical Review B-Condensed Matter
Publication Date February 15, 2023
Publisher Identifier (DOI)
  1. https://doi.org/10.1103/PhysRevB.107.085140
Deposited November 22, 2024

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Version 1
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  • Created
  • Added 2211.17027-1.pdf
  • Added Creator Yanan Li
  • Added Creator Huichao Wang
  • Added Creator Jingyue Wang
  • Added Creator Chunming Wang
  • Added Creator Yanzhao Liu
  • Added Creator Jun Ge
  • Added Creator Jingjing Niu
  • Added Creator Wenjie Zhang
  • Added Creator Pinyuan Wang
  • Added Creator Ran Bi
  • Added Creator Jinglei Zhang
  • Added Creator Ji Yan Dai
  • Added Creator Jiaqiang Yan
  • Added Creator David Mandrus
  • Added Creator Nitin Samarth
  • Added Creator Haizhou Lu
  • Added Creator Xiaosong Wu
  • Added Creator Jian Wang
  • Published
  • Updated