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Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals

Authors :
Luis Balicas
Andrés F. Santander-Syro
Kuan-Wen Chen
K. Miyamoto
Julien E. Rault
E. Frantzeskakis
Ryan Baumbach
J. Dai
Taichi Okuda
F. Fortuna
Efstratios Manousakis
Niraj Aryal
P. Le Fèvre
Institut des Sciences Moléculaires d'Orsay (ISMO)
Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Source :
Physical Review Letters, Physical Review Letters, American Physical Society, 2021, 126 (19), ⟨10.1103/PhysRevLett.126.196407⟩
Publication Year :
2021
Publisher :
American Physical Society (APS), 2021.

Abstract

We report the observation of a non-trivial spin texture in Dirac node arcs, novel topological objects formed when Dirac cones of massless particles extend along an open one-dimensional line in momentum space. We find that such states are present in all the compounds of the tetradymite M$_2$Te$_2$X family (M$=$Ti, Zr or Hf and X$=$P or As), regardless of the weak or strong character of the topological invariant. The Dirac node arcs in tetradymites are thus the simplest possible, textbook example, of a type-I Dirac system with a single spin-polarized node arc.<br />Main Text + Supplementary Information, 12 pages, 11 figures

Details

ISSN :
10797114 and 00319007
Volume :
126
Database :
OpenAIRE
Journal :
Physical Review Letters
Accession number :
edsair.doi.dedup.....b1adcb8bb0fe9e5c4d4e82b25f65fb09
Full Text :
https://doi.org/10.1103/physrevlett.126.196407