Anomalous Transport Signatures in Weyl Semimetals with Point Defects

被引：10

作者：

Pires, J. P. Santos ^{[1
,2
,3
]}

Joao, S. M. ^{[1
,2
,3
,8
]}

Ferreira, Aires ^{[4
,5
]}

Amorim, B. ^{[6
,7
]}

Lopes, J. M. Viana Parente ^{[1
,2
,3
]}

机构：

[1] Univ Porto, Dept Fis & Astron, Fac Ciencias, Rua Campo Alegre s-n, P-4169007 Porto, Portugal

[2] Univ Porto, Ctr Fis Univ Minho & Porto CF UM UP, P-4169007 Porto, Portugal

[3] Univ Porto, Lab Fis Mat & Tecnol Emergentes LaPMET, P-4169007 Porto, Portugal

[4] Univ York, Dept Phys, York YO10 5DD, England

[5] Univ York, York Ctr Quantum Technol, York YO10 5DD, England

[6] Univ Minho, Ctr Fis Univ Minho & Porto CF UM UP, Campus Gualtar 4710-057, Braga, Portugal

[7] Univ Minho, Lab Fis Mat & Tecnol Emergentes LaPMET, Campus Gualtar 4710-057, Braga, Portugal

[8] Imperial Coll London, Dept Mat, London SW7 2AZ, England

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 129卷 / 19期

关键词：

CONDUCTION;

D O I：

10.1103/PhysRevLett.129.196601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first theoretical study of transport properties of Weyl semimetals with point defects. Focusing on a class of time-reversal symmetric Weyl lattice models, we show that dilute lattice vacancies induce a finite density of quasilocalized states at and near the nodal energy, causing strong modifications to the low-energy spectrum. This generates novel transport effects, namely, (i) an oscillatory behavior of the dc conductivity with the charge carrier density in the absence of magnetic fields, and (ii) a plateau-shaped dissipative optical response for photon frequencies below the interband threshold, EF less than or similar to PLANCK CONSTANT OVER TWO PI omega less than or similar to 2EF. Our results provide a path to engineer unconventional quantum transport effects in Weyl semimetals by means of common point defects.

引用

页数：6

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