期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.217601
关键词
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资金
- Ministry of Science and Technology of China [2013CB921700, 2015CB921300, 2011CBA00108, 2011CBA001000]
- National Natural Science Foundation of China [11474340, 11422428, 11274362, 11234014]
- Chinese Academy of Sciences [XDB07000000]
- Sino-Swiss Science and Technology Cooperation [IZLCZ2138954]
- Swiss National Science Foundation [200021-137783, PP00P2_144742/1]
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.
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