Magnetic-field-induced nontrivial electronic state in the Kondo-lattice semimetal CeSb

Y. Fang, F. Tang, Y. R. Ruan, J. M. Zhang, H. Zhang, H. Gu, W. Y. Zhao, Z. D. Han, W. Tian, B. Qian, X. F. Jiang, X. M. Zhang, and X. Ke
Phys. Rev. B 101, 094424 – Published 19 March 2020
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Abstract

Synergic effect of electronic correlation and spin-orbit coupling is an emerging topic in topological materials. Central to this rapidly developing area are the prototypes of strongly correlated heavy-fermion systems. Recently, some Ce-based compounds are proposed to host intriguing topological nature, among which the electronic properties of CeSb are still under debate. In this paper, we report a comprehensive study combining magnetic and electronic transport measurements, and electronic band-structure calculations of this compound to identify its topological nature. Quantum oscillations are clearly observed in both magnetization and magnetoresistance at high fields, from which one pocket with a nontrivial Berry phase is recognized. Angular-dependent magnetoresistance shows that this pocket is elongated in nature and corresponds to the electron pocket as observed in LaBi. Nontrivial electronic structure of CeSb is further confirmed by first-principle calculations, which arises from spin splitting in the fully polarized ferromagnetic state. These features indicate that magnetic field can induce nontrivial topological electronic states in this prototypical Kondo semimetal.

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  • Received 5 December 2019
  • Revised 24 February 2020
  • Accepted 3 March 2020

DOI:https://doi.org/10.1103/PhysRevB.101.094424

©2020 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Y. Fang1,*, F. Tang1, Y. R. Ruan2, J. M. Zhang2,†, H. Zhang3, H. Gu1, W. Y. Zhao4, Z. D. Han1, W. Tian5, B. Qian1, X. F. Jiang1, X. M. Zhang6, and X. Ke3,‡

  • 1Jiangsu Laboratory of Advanced Functional Materials, Department of Physics, Changshu Institute of Technology, Changshu 215500, China
  • 2Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China
  • 3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 4ISEM, Innovation Campus, University of Wollongong, Wollongong, New South Wales 2500, Australia
  • 5Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 6School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China

  • *fangyong@cslg.edu.cn
  • jmzhang@fjnu.edu.cn
  • kexiangl@msu.edu

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Issue

Vol. 101, Iss. 9 — 1 March 2020

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