Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators

Yang H, Yu J, Parkin SSP, Felser C, Liu CX, Yan B (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review Letters American Physical Society

Book Volume: 119

Article Number: 136401

Journal Issue: 13

DOI: 10.1103/PhysRevLett.119.136401

Abstract

We predict the existence of triple point fermions in the band structure of several half-Heusler topological insulators by ab initio calculations and the Kane model. We find that many half-Heusler compounds exhibit multiple triple points along four independent C3 axes, through which the doubly degenerate conduction bands and the nondegenerate valence band cross each other linearly nearby the Fermi energy. When projected from the bulk to the (111) surface, most of these triple points are located far away from the surface Γ point, as distinct from previously reported triple point fermion candidates. These isolated triple points give rise to Fermi arcs on the surface, that can be readily detected by photoemission spectroscopy or scanning tunneling spectroscopy.

Involved external institutions

Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE) Pennsylvania State University (Penn State) US United States (USA) (US) Weizmann Institute of Science IL Israel (IL) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Yang, H., Yu, J., Parkin, S.S.P., Felser, C., Liu, C.-X., & Yan, B. (2017). Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators. Physical Review Letters, 119(13). https://doi.org/10.1103/PhysRevLett.119.136401

MLA:

Yang, Hao, et al. "Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators." Physical Review Letters 119.13 (2017).

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