Electrodynamic response of the type-II Weyl semimetal YbMnBi2

被引：57

作者：

Chinotti, M. ^{[1
]}

Pal, A. ^{[1
]}

Ren, W. J. ^{[2
,3
,4
]}

Petrovic, C. ^{[2
,3
]}

Degiorgi, L. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Festkorperphys Lab, CH-8093 Zurich, Switzerland

[2] Brookhaven Natl Lab, Condensed Matter Phys, Upton, NY 11973 USA

[3] Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA

[4] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 24期

基金：

瑞士国家科学基金会;

关键词：

FERMION SEMIMETAL;

D O I：

10.1103/PhysRevB.94.245101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Weyl fermions play a major role in quantum field theory but have been quite elusive as fundamental particles. Materials based on quasi-two-dimensional bismuth layers were recently designed and provide an arena for studying the interplay between anisotropic Dirac fermions, magnetism, and structural changes, allowing the formation of Weyl fermions in condensed matter. Here, we perform an optical investigation of YbMnBi2, a representative type-IIWeyl semimetal, and contrast its excitation spectrum with the optical response of the more conventional semimetal EuMnBi2. Our comparative study allows us to disentangle the optical fingerprints of type-IIWeyl fermions, but also challenges the present theoretical understanding of their electrodynamic response.

引用

页数：5

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