期刊
PHYSICAL REVIEW B
卷 93, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.201101
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG) [FOR1346]
- DFG through the Collaborative Research Center [SFB 1143]
- Harvard-MIT CUA
In metallic condensed matter systems two different types of Weyl fermions can in principle emerge, with either a vanishing (type-I) or with a finite (type-II) density of states at the Weyl node energy. So far only WTe2 and MoTe2 were predicted to be type-II Weyl semimetals. Here we identify TaIrTe4 as a third member of this family of topological semimetals. TaIrTe4 has the attractive feature that it hosts only four well-separated Weyl points, the minimum imposed by symmetry. Moreover, the resulting topological surface states-Fermi arcs connecting Weyl nodes of opposite chirality-extend to about 1/3 of the surface Brillouin zone. This large momentum-space separation is very favorable for detecting the Fermi arcs spectroscopically and in transport experiments.
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