TaIrTe4: A ternary type-II Weyl semimetal

By K. Koepernik, D. Kasinathan, D. Efremov, S. Khim, Sergey V. Borisenko, B. Büchner, J. van den Brink. 2016

172 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/eb81aa2e0320e4798461939329aacdefe727dc69

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. Ashvin Vishwanath
2. N. P. Armitage
3. J. Venderbos
4. Andrew M. Rappe
5. Youngkuk Kim
6. Heng Gao
7. E. Mele
8. E. Witten

In Materials Chemistry

1. Ashvin Vishwanath
2. J. Venderbos
3. Andrew M. Rappe
4. Youngkuk Kim
5. Heng Gao
6. N. P. Armitage
7. E. Mele
8. Xiao-Liang Qi

Citations in the corpus

• Weyl and Dirac semimetals in three-dimensional solids (2017, methodology): “…2016b; Tamai et al., 2016), WTe2 (Wang et al., 2016c), their alloy MoxW1−xTe2 (Belopolski et al., 2016a,b) and TaIrTe4 (Belopolski et al., 2016d; Haubold et al., 2017; Koepernik et al., 2016), although the evidence in the case of WTe2 is controversial as discussed below and in (Bruno et al., 2016).”
• Topological Semimetals from First Principles (2018, methodology): “For experimental studies it is furthermore desirable to have a system with a small number of Weyl points and with this in mind material candidates hosting the minimum number of four Weyl points were proposed, notably including the ternary compound TaIrTe4 (103) and MoTe2 (104).”