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 M2Te2X 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.
@article{arxiv.2105.07515,
title = {Experimental observation and spin texture of Dirac node arcs in tetradymite topological metals},
author = {J. Dai and E. Frantzeskakis and N. Aryal and K. -W. Chen and F. Fortuna and J. E. Rault and P. Le Fèvre and L. Balicas and K. Miyamoto and T. Okuda and E. Manousakis and R. E. Baumbach and A. F. Santander-Syro},
journal= {arXiv preprint arXiv:2105.07515},
year = {2021}
}
Comments
Main Text + Supplementary Information, 12 pages, 11 figures