Enhanced anomalous Hall effect in the magnetic topological semimetal Co3Sn2xInxS2

Huibin Zhou, Guoqing Chang, Guangqiang Wang, Xin Gui, Xitong Xu, Jia-Xin Yin, Zurab Guguchia, Songtian S. Zhang, Tay-Rong Chang, Hsin Lin, Weiwei Xie, M. Zahid Hasan, and Shuang Jia
Phys. Rev. B 101, 125121 – Published 24 March 2020
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Abstract

We study the anomalous Hall effect (AHE) of single-crystalline Co3Sn2xInxS2 over a large range of indium concentration x from 0 to 1. Their magnetization reduces progressively with increasing x while their ground state evolves from a ferromagnetic Weyl semimetal into a nonmagnetic insulator. Remarkably, after systematically scaling the AHE, we find that their intrinsic anomalous Hall conductivity (AHC) features an unexpected maximum at around x=0.15. The change of the intrinsic AHC corresponds with the doping evolution of Berry curvature and the maximum arises from the magnetic topological nodal-ring gap. Our experimental results show a larger AHC in a fundamental nodal-ring gap than that of Weyl nodes.

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  • Received 16 January 2020
  • Revised 5 March 2020
  • Accepted 6 March 2020

DOI:https://doi.org/10.1103/PhysRevB.101.125121

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Huibin Zhou1, Guoqing Chang2, Guangqiang Wang1, Xin Gui3, Xitong Xu1, Jia-Xin Yin2, Zurab Guguchia2,4, Songtian S. Zhang2, Tay-Rong Chang5, Hsin Lin6, Weiwei Xie3, M. Zahid Hasan2,7,8, and Shuang Jia1,9,10,11,*

  • 1International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
  • 2Laboratory for Topological Quantum Matter and Advanced Spectroscopy(B7), Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
  • 3Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
  • 4Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 5Department of Physics, National Cheng Kung University, Tainan 701, Taiwan
  • 6Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
  • 7Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA
  • 8Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 9Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 10CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
  • 11Beijing Academy of Quantum Information Sciences, West Building 3, No. 10 Xibeiwang East Road, Haidian District, Beijing 100193, China

  • *gwljiashuang@pku.edu.cn

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Issue

Vol. 101, Iss. 12 — 15 March 2020

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