Observation of topological surface states and strong electron/hole imbalance in extreme magnetoresistance compound LaBi

Jiang J, Schroter NBM, Wu SC, Kumar N, Shekhar C, Peng H, Xu X, Chen C, Yang HF, Hwang CC, Mo SK, Felser C, Yan BH, Liu ZK, Yang LX, Chen YL (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Physical Review Materials American Physical Society

Book Volume: 2

Article Number: 024201

Journal Issue: 2

DOI: 10.1103/PhysRevMaterials.2.024201

Abstract

The recent discovery of the extreme magnetoresistance (XMR) in the nonmagnetic rare-earth monopnictides LaX (X = P, As, Sb, Bi,), a recently proposed new topological semimetal family, has inspired intensive research effort in the exploration of the correlation between the XMR and their electronic structures. In this work, using angle-resolved photoemission spectroscopy to investigate the three-dimensional band structure of LaBi, we unraveled its topologically nontrivial nature with the observation of multiple topological surface Dirac fermions, as supported by our ab initio calculations. Furthermore, we observed substantial imbalance between the volume of electron and hole pockets, which rules out the electron-hole compensation as the primary cause of the XMR in LaBi.

Involved external institutions

ShanghaiTech University / 上海科技大学 CN China (CN) University of Oxford GB United Kingdom (GB) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Tsinghua University CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Pohang University of Science and Technology (POSTECH) KR Korea, Republic of (KR) Lawrence Berkeley National Laboratory (LBNL) US United States (USA) (US)

How to cite

APA:

Jiang, J., Schroter, N.B.M., Wu, S.-C., Kumar, N., Shekhar, C., Peng, H.,... Chen, Y.L. (2018). Observation of topological surface states and strong electron/hole imbalance in extreme magnetoresistance compound LaBi. Physical Review Materials, 2(2). https://doi.org/10.1103/PhysRevMaterials.2.024201

MLA:

Jiang, J., et al. "Observation of topological surface states and strong electron/hole imbalance in extreme magnetoresistance compound LaBi." Physical Review Materials 2.2 (2018).

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