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

Hao Yang, Jiabin Yu, Stuart S.P. Parkin, Claudia Felser, Chao Xing Liu, Binghai Yan

Research output: Contribution to journalArticle

34 Citations (Scopus)

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.

Original languageEnglish (US)
Article number136401
JournalPhysical Review Letters
Volume119
Issue number13
DOIs
StatePublished - Sep 28 2017

Fingerprint

fermions
insulators
predictions
spectroscopy
conduction bands
photoelectric emission
arcs
valence
scanning
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Yang, Hao ; Yu, Jiabin ; Parkin, Stuart S.P. ; Felser, Claudia ; Liu, Chao Xing ; Yan, Binghai. / Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators. In: Physical Review Letters. 2017 ; Vol. 119, No. 13.
@article{58c1725ef3e14e4b88c43633fbf3ce85,
title = "Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators",
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.",
author = "Hao Yang and Jiabin Yu and Parkin, {Stuart S.P.} and Claudia Felser and Liu, {Chao Xing} and Binghai Yan",
year = "2017",
month = "9",
day = "28",
doi = "10.1103/PhysRevLett.119.136401",
language = "English (US)",
volume = "119",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "13",

}

Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators. / Yang, Hao; Yu, Jiabin; Parkin, Stuart S.P.; Felser, Claudia; Liu, Chao Xing; Yan, Binghai.

In: Physical Review Letters, Vol. 119, No. 13, 136401, 28.09.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators

AU - Yang, Hao

AU - Yu, Jiabin

AU - Parkin, Stuart S.P.

AU - Felser, Claudia

AU - Liu, Chao Xing

AU - Yan, Binghai

PY - 2017/9/28

Y1 - 2017/9/28

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85030171986&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85030171986&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.119.136401

DO - 10.1103/PhysRevLett.119.136401

M3 - Article

C2 - 29341689

AN - SCOPUS:85030171986

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 13

M1 - 136401

ER -