Topological phase transition in half-Heusler compounds HfIrX (X = As, Sb, Bi)
Topological phase transition in half-Heusler compounds HfIrX (X = As, Sb, Bi)
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半赫斯勒化合物 HfIrX(X = As、Sb、Bi)中的拓扑相变
DOI:
10.1016/j.commatsci.2016.08.005
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发表时间:
2016-11
影响因子:
3.3
通讯作者:
Wei, JunHong
中科院分区:
文献类型:
--
作者:
Wang, Guangtao;Wei, JunHong
We studied the lattice constant and atoms substitution tunable topological phase transition in the half-Heusler compounds HfIrX (X= As, Sb, Bi). At the equilibrium cubic crystal structure and excluding SOC, HfIrAs and HfIrBi are topological nontrivial semimetal, while HfIrSb is a trivial topological insulator. This is because that the “internal pressure” lifts the s-type Γ 1 band above p-type Γ 5 bands in HfIrSb. When SOC is included, HfIrAs and HfIrSb become topological insulator, and normal band insulator, respectively, while HfIrBi is still a topological semimetal. When we induce compressive stress in the ab-plane of HfIrBi, it becomes a Weyl semimetal, with eight Weyl-Points (WPS) at (±K x, 0,±K z),(0,±K y,±K z), K x= K y= 0.023 Å− 1, K z= 0.108 Å− 1.
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影响因子:
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作者:
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通讯作者:
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DOI:
--
发表时间:
2011
期刊:
--
影响因子:
--
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通讯作者:
Xiangang Wan;Ari M. Turner;A. Vishwanath