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

Dai, J.; Frantzeskakis, E.; Aryal, N.; Chen, K. -W.; Fortuna, F.; Rault, J. E.; Le Fèvre, P.; Balicas, L.; Miyamoto, K.; Okuda, T.; Manousakis, E.; Baumbach, R.  E.; Santander-Syro, A. F.

doi:10.1103/physrevlett.126.196407

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

Journal Article · Fri May 14 00:00:00 EDT 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.126.196407· OSTI ID:1782813

Dai, J. ^[1]; ^[2]; Aryal, N. ^[3]; ^[4]; ^[2]; Rault, J. E. ^[5]; Le Fèvre, P. ^[5]; ^[6]; Miyamoto, K. ^[6]; Okuda, T. ^[7]; Manousakis, E. ^[8]; Baumbach, R. E. ^[6]; ^[2]

Univ. Paris-Saclay, Orsay (France); Ecole Polytechnique Federale Lausanne (Switzerland); National High Magnetic Field Lab
Univ. Paris-Saclay, Orsay (France)
Florida State Univ., Tallahassee, FL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Florida State Univ., Tallahassee, FL (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Synchrotron SOLEIL, Gif-sur-Yvette (France)
Florida State Univ., Tallahassee, FL (United States)
Hiroshima Univ. (Japan)
Florida State Univ., Tallahassee, FL (United States); National and Kapodistrian Univ. of Athens (Greece)

We report the observation of a nontrivial spin texture in Dirac node arcs, i.e., 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 M₂Te₂X family (M=Ti, Zr, or Hf and X=P or As) regardless of the weak or strong character of the topological invariant. Finally, 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.

View Accepted Manuscript (DOE)

Research Organization:: Florida State Univ., Tallahassee, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0002613

OSTI ID:: 1782813

Alternate ID(s):: OSTI ID: 1820919

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 126; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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