Anomalous magnetothermoelectric behavior in massive 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
Phys. Rev. B 107, 085140 – Published 23 February 2023
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Abstract

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.

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  • Received 1 January 2022
  • Revised 2 February 2023
  • Accepted 6 February 2023

DOI:https://doi.org/10.1103/PhysRevB.107.085140

©2023 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yanan Li1,2, Huichao Wang3, Jingyue Wang4,5, Chunming Wang6,7, Yanzhao Liu1, Jun Ge1, Jingjing Niu4, Wenjie Zhang4, Pinyuan Wang1, Ran Bi4, Jinglei Zhang8, Ji-Yan Dai9, Jiaqiang Yan10, David Mandrus10,11, Nitin Samarth2, Haizhou Lu7,12,*, Xiaosong Wu4,13,†, and Jian Wang1,7,14,15,16,17,‡

  • 1International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
  • 2Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
  • 3School of Physics, Sun Yat-sen University, Guangzhou 510275, China
  • 4State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China
  • 5Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • 6Department of Physics, Shanghai Normal University, Shanghai 200234, China
  • 7Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
  • 8High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, Anhui, China
  • 9Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
  • 10Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 11Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 12Shenzhen Key Laboratory of Quantum Science and Engineering, Shenzhen 518055, China
  • 13Beijing Key Laboratory of Quantum Devices, Peking University, Beijing 100871, China
  • 14Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 15CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
  • 16Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  • 17Hefei National Laboratory, Hefei 230088, China

  • *luhz@sustech.edu.cn
  • xswu@pku.edu.cn
  • jianwangphysics@pku.edu.cn

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Issue

Vol. 107, Iss. 8 — 15 February 2023

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