Distinct Electronic Structure for the Extreme Magnetoresistance in YSb

Junfeng He; Chaofan Zhang; Nirmal J Ghimire; Tian Liang; Chunjing Jia; Juan Jiang; Shujie Tang; Sudi Chen; Yu He; S-K Mo; C C Hwang; M Hashimoto; D H Lu; B Moritz; T P Devereaux; Y L Chen; J F Mitchell; Z-X Shen

doi:10.1103/PhysRevLett.117.267201

Distinct Electronic Structure for the Extreme Magnetoresistance in YSb

Phys Rev Lett. 2016 Dec 23;117(26):267201. doi: 10.1103/PhysRevLett.117.267201. Epub 2016 Dec 23.

Authors

Junfeng He^{1

2}, Chaofan Zhang^{1

2}, Nirmal J Ghimire³, Tian Liang^{1

2}, Chunjing Jia^{1

2}, Juan Jiang^{4

5

6}, Shujie Tang^{1

2}, Sudi Chen^{1

2}, Yu He^{1

2}, S-K Mo⁴, C C Hwang⁶, M Hashimoto⁷, D H Lu⁷, B Moritz^{1

2}, T P Devereaux^{1

2}, Y L Chen^{5

8}, J F Mitchell³, Z-X Shen^{1

2}

Affiliations

¹ Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
² Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA.
³ Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
⁴ Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
⁵ School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, People's Republic of China.
⁶ Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Korea.
⁷ Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
⁸ Physics Department, University of Oxford, Oxford OX1 3PU, United Kingdom.

PMID: 28059532
DOI: 10.1103/PhysRevLett.117.267201

Abstract

An extreme magnetoresistance (XMR) has recently been observed in several nonmagnetic semimetals. Increasing experimental and theoretical evidence indicates that the XMR can be driven by either topological protection or electron-hole compensation. Here, by investigating the electronic structure of a XMR material, YSb, we present spectroscopic evidence for a special case which lacks topological protection and perfect electron-hole compensation. Further investigations reveal that a cooperative action of a substantial difference between electron and hole mobility and a moderate carrier compensation might contribute to the XMR in YSb.