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Title: Electrodynamic response of the type-II Weyl semimetal YbMnBi 2

Journal Article · · Physical Review B
 [1];  [1];  [2];  [3];  [1]
  1. ETH Zurich (Switzerland). Lab. for Solid State Physics
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Chinese Academy of Sciences (CAS), Shenyang (China). Inst. of Metal Research and Shenyang National Lab. for Materials Science
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

Weyl fermions play a major role in quantum field theory but have been quite elusive as fundamental particles. These quasi-two-dimensional bismuth layers based materials 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. We perform an optical investigation of YbMnBi 2 , a representative type-II Weyl semimetal, and contrast its excitation spectrum with the optical response of the more conventional semimetal EuMnBi 2 . This 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI ID:
1342653
Alternate ID(s):
OSTI ID: 1334208
Report Number(s):
BNL--113489-2017-JA; KC0201050
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 24 Vol. 94; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Transport and optics at the node in a nodal loop semimetal text January 2017
Magnetic structure and excitations of the topological semimetal YbMnBi 2 journal October 2019
Ferromagnetic Weyl semimetal phase in a tetragonal structure journal November 2017
Weyl and Dirac semimetals in three-dimensional solids journal January 2018
Optical spectroscopy study of the topological property in PrSb journal September 2019
Quasi-two-dimensional massless Dirac fermions in CaMnSb 2 journal January 2017
Anomalous DC Hall response in noncentrosymmetric tilted Weyl semimetals journal February 2018
Weyl and Dirac Semimetals in Three Dimensional Solids text January 2017
Enhanced magnetopiezoelectric effect at the Néel temperature in CaMn 2 Bi 2 journal August 2019
Imaginary part of Hall conductivity in tilted doped Weyl semimetal with both broken time reversal and inversion symmetry text January 2018
Absorption of circular polarized light in tilted type-I and type-II Weyl semimetals journal August 2017
Optical signature of Weyl electronic structures in tantalum pnictides Ta P n ( P n = P, As) journal August 2017
Transport and optics at the node in a nodal loop semimetal journal June 2017
Optical investigation of the strong spin-orbit-coupled magnetic semimetal YbMnBi 2 journal August 2017
Observation of a topological nodal-line semimetal in YbMnSb 2 through optical spectroscopy journal September 2019
Anomalous DC Hall response in noncentrosymmetric tilted Weyl semimetals text January 2018
Signatures of coupling between spin waves and Dirac fermions in YbMnBi 2 journal January 2020
Imaginary part of Hall conductivity in a tilted doped Weyl semimetal with both broken time-reversal and inversion symmetry journal January 2018
Infrared spectroscopic measurements of structural transition and charge dynamics in 1 T − TiTe 2 under pressure journal March 2019
Doping and tilting on optics in noncentrosymmetric multi-Weyl semimetals journal January 2018
Epsilon-near-zero response and tunable perfect absorption in Weyl semimetals journal August 2018
Epsilon-Near-Zero Response and Tunable Perfect Absorption in Weyl Semimetals text January 2018
Topological antiferromagnetic spintronics journal March 2018