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26 April 2024 |
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TaIrTe4 a ternary Type-II Weyl semi-metal | | K. Koepernik
; D. Kasinathan
; D.V. Efremov
; Seunghyun Khim
; Sergey Borisenko
; Bernd Büchner
; Jeroen van den Brink
; | | Date: |
14 Mar 2016 | | Abstract: | 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 semi-metals. Here we identify TaIrTe4 as a
third member of this family of topological semi-metals. 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. | | Source: | arXiv, 1603.4323 | | Services: | Forum | Review | PDF | Favorites | |
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