Electrodynamic response of the type-II Weyl semimetalYbMnBi2

2016/07/28 by M. Chinotti, A. Pal, W. J. Ren +4 · 2 citations
Physics and Astronomy · #Algorithm #Artificial intelligence #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Condensed matter physics #Geology #Physics #Rare-earth and actinide compounds #Semimetal #Topological Materials and Phenomena #Type (biology) #Weyl semimetal #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.94.245101

published as Phys. Rev. B 94, 245101 (2016)

arxiv created 2016/07/28 · openalex created_date 2016/08/23 · openalex publication_date 2016/12/01 · arxiv updated 2016/12/07 · openalex updated_date 2026/08/05

Abstract

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-II Weyl 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-II Weyl fermions, but also challenges the present theoretical understanding of their electrodynamic response.

Citations

• Chern Semimetal and the Quantized Anomalous Hall Effect inHgCr2Se4
• Topological Insulators
• Discovery of a Weyl fermion semimetal and topological Fermi arcs
• Two-dimensional Dirac fermions in YbMnBi2 antiferromagnet
• Interband optical conductivity of the [001]-oriented Dirac semimetalCd3As2

Cited by

• Observation of a Magnetopiezoelectric Effect in the Antiferromagnetic Metal EuMnBi2
• Absorption of circular polarized light in tilted type-I and type-II Weyl semimetals