Observation of Fermi-Arc Spin Texture in TaAs

We have investigated the spin texture of surface Fermi arcs in the recently discovered Weyl semimetal TaAs using spin- and angle-resolved photoemission spectroscopy. The experimental results demonstrate that the Fermi arcs are spin polarized. The measured spin texture fulfills the requirement of mirror and time-reversal symmetries and is well reproduced by our first-principles calculations, which gives strong evidence for the topologically nontrivial Weyl semimetal state in TaAs. The consistency between the experimental and calculated results further confirms the distribution of chirality of the Weyl nodes determined by first-principles calculations.


Published in:
Physical Review Letters, 115, 21, 217601
Year:
2015
Publisher:
College Pk, American Physical Society
ISSN:
0031-9007
Note:
B.Q. Lv and S. Muff contributed equal to this paper
Laboratories:




 Record created 2016-02-16, last modified 2018-09-13

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