Prediction of Ideal Topological Semimetals with Triply Degenerate Points in the NaCu_{3}Te_{2} Family

Physical Review Letters
Jianfeng WangBing Huang

Abstract

Triply degenerate points (TDPs) in band structure of a crystal can generate novel TDP fermions without high-energy counterparts. Although identifying ideal TDP semimetals, which host clean TDP fermions around the Fermi level (E_{F}) without coexisting with other quasiparticles, is critical to explore the intrinsic properties of this new fermion, it is still a big challenge and has not been achieved up to now. Here, we disclose an effective approach to search for ideal TDP semimetals via selective band crossing between antibonding s and bonding p orbitals along a line in the momentum space with C_{3v} symmetry. Applying this approach, we have successfully identified the NaCu_{3}Te_{2} family of compounds to be ideal TDP semimetals, where two, and only two, pairs of TDPs are located around the E_{F}. Moreover, we demonstrate a fundamental mechanism to modulate energy splitting between a pair of TDPs, and we illustrate the intrinsic features of TDP Fermi arcs in these ideal TDP semimetals.

References

Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jun 30, 1986·Physical Review Letters·M CardonaG Fasol
Jul 6, 1987·Physical Review Letters·S H Wei, A Zunger
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Jan 17, 2015·Science·Su-Yang XuM Zahid Hasan
Nov 27, 2015·Nature·Alexey A SoluyanovB Andrei Bernevig
Jun 9, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hongming WengZhong Fang
Aug 27, 2016·Physical Review Letters·Georg W WinklerAlexey A Soluyanov
May 12, 2017·Scientific Reports·Guoqing ChangM Zahid Hasan
Jan 18, 2018·Physical Review Letters·Hao YangBinghai Yan

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Citations

May 5, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·R C XiaoY P Sun
Apr 26, 2018·Physical Review Letters·Huaqing HuangFeng Liu
Jan 25, 2020·Physical Review Letters·Run-Wu ZhangYugui Yao
Jan 26, 2021·Physical Chemistry Chemical Physics : PCCP·Xinxin Zhao, Yiming Mi

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