Universal Minimum Conductivity in Disordered Double-Weyl Semimetal

被引：0

作者：

宁震 ^{[1
]}

付博 ^{[2
]}

石勤伟 ^{[3
]}

王晓平 ^{[1
,3
]}

机构：

[1] Department of Physics University of Science and Technology of China

[2] Department of Physics The University of Hong Kong Pokfulam Road

[3] Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of QuantumInformation and Quantum Physics University of Science and Technology of China

来源：

Chinese Physics Letters | 2020年 / 37卷 / 11期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report an exact numerical study on disorder effect in double-Weyl semimetals, and compare exact numerical solutions for the quasiparticle behavior with the Born approximation and renormalization group results. It is revealed that the low-energy quasiparticle properties are renormalized by multiple-impurity scattering processes,leading to apparent power-law behavior of the self-energy. Therefore, the quasiparticle residue surrounding nodal points is considerably reduced and vanishes as ZE ∝Er with nonuniversal exponent . We show that such unusual behavior of the quasiparticle leads to strong temperature dependence of diffusive conductivity. Remarkably, we also find a universal minimum conductivity along the direction of linear dispersion at the nodal point, which can be directly observed by experimentalist.

引用

页码：81 / 87

页数：7