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Title: Optical spectroscopy of the Weyl semimetal TaAs

Journal Article · · Physical Review B
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [3];  [2];  [2];  [2];  [3]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)

Here, we present a systematic study of both the temperature and frequency dependence of the optical response in TaAs, a material that has recently been realized to host the Weyl semimetal state. Our study reveals that the optical conductivity of TaAs features a narrow Drude response alongside a conspicuous linear dependence on frequency. The weight of the Drude peak decreases upon cooling, following a T2 temperature dependence, in good agreement with theoretical predictions. Two linear components with distinct slopes dominate the low-temperature optical conductivity. A comparison between our experimental results and theoretical calculations suggests that the linear conductivity below ~230 cm–1 arises purely from interband transitions near the Weyl points, providing rich information about the Weyl semimetal state in TaAs.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
2015CB921303; 2015CB921102; 2012CB921302; 2012CB821403; 91121004; 91421304; 11374345; AC52-06NA25396
OSTI ID:
1258444
Alternate ID(s):
OSTI ID: 1243157
Report Number(s):
LA-UR-15-27435; PRBMDO
Journal Information:
Physical Review B, Vol. 93, Issue 12; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 136 works
Citation information provided by
Web of Science

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Cited By (54)

Anisotropic Broadband Photoresponse of Layered Type-II Weyl Semimetal MoTe 2 journal April 2018
A Wide-Range Photosensitive Weyl Semimetal Single Crystal-TaAs journal September 2018
Advanced Materials and Device Architectures for Magnetooptical Spatial Light Modulators journal November 2019
Effect of Mechanical Strain on the Optical Properties of Nodal‐Line Semimetal ZrSiS journal November 2019
Charge Density Waves and Magnetism in Topological Semimetal Candidates GdSb x Te 2− x δ journal July 2019
Optical Distinctions Between Weyl Semimetal TaAs and Dirac Semimetal Na3Bi: An Ab Initio Investigation journal July 2016
Temperature-tunable Fano resonance induced by strong coupling between Weyl fermions and phonons in TaAs journal March 2017
Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals journal December 2016
Direct optical detection of Weyl fermion chirality in a topological semimetal journal May 2017
Chiral terahertz wave emission from the Weyl semimetal TaAs journal February 2020
Colossal mid-infrared bulk photovoltaic effect in a type-I Weyl semimetal journal March 2019
Validity of Weyl fermion picture for transition metals monopnictides TaAs, TaP, NbAs, and NbP from ab initio studies journal February 2018
Ab initio optical and energy loss spectra of transition metal monopnictides TaAs, TaP, NbAs, and NbP journal November 2018
Anomalous DC Hall response in noncentrosymmetric tilted Weyl semimetals journal February 2018
Weak-value amplification for Weyl-point separation in momentum space journal October 2018
Experimental progress on layered topological semimetals journal April 2019
Signatures of merging Dirac points in optics and transport journal July 2019
Fermi surface gapping in the Dirac material Ca 1 x Na x MnBi 2 journal July 2019
Optical spectroscopy study of the topological property in PrSb journal September 2019
Electrodynamic response of the type-II Weyl semimetal YbMnBi 2 journal December 2016
Optical signature of Weyl electronic structures in tantalum pnictides Ta P n ( P n = P, As) journal August 2017
Absorption of circular polarized light in tilted type-I and type-II Weyl semimetals journal August 2017
Optical conductivity of three and two dimensional topological nodal-line semimetals journal October 2017
Imaginary part of Hall conductivity in a tilted doped Weyl semimetal with both broken time-reversal and inversion symmetry journal January 2018
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
Optical conductivity of the Weyl semimetal NbP journal November 2018
Tunable surface plasmons in Weyl semimetals TaAs and NbAs journal March 2019
Infrared spectroscopic measurements of structural transition and charge dynamics in 1 T TiTe 2 under pressure journal March 2019
Electromagnetic fields induced by an electric charge near a Weyl semimetal journal April 2019
Optical evidence of the type-II Weyl semimetals MoTe 2 and WTe 2 journal May 2019
Linear-in-Frequency Optical Conductivity in GdPtBi due to Transitions near the Triple Points journal October 2018
Magnetization-Induced Band Shift in Ferromagnetic Weyl Semimetal Co 3 Sn 2 S 2 journal February 2020
Optoelectronic response of the type-I Weyl semimetals TaAs and NbAs from first principles journal January 2020
Dielectric response and novel electromagnetic modes in three-dimensional Dirac semimetal films text January 2016
Electrodynamic response of type II Weyl semimetals text January 2016
Temperature-tunable Fano resonance induced by strong coupling between Weyl fermions and phonons in TaAs text January 2016
Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals text January 2016
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Optical conductivity of three and two dimensional topological nodal line semimetals text January 2017
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Anomalous DC Hall response in noncentrosymmetric tilted Weyl semimetals text January 2018
Imaginary part of Hall conductivity in tilted doped Weyl semimetal with both broken time reversal and inversion symmetry text January 2018
Optical conductivity of the Weyl semimetal NbP text January 2018
Epsilon-Near-Zero Response and Tunable Perfect Absorption in Weyl Semimetals text January 2018
Electromagnetic fields induced by an electric charge near a Weyl semimetal text January 2018
Tracking ultrafast photocurrents in the Weyl semimetal TaAs using THz emission spectroscopy text January 2018
Chiral terahertz wave emission from the Weyl semimetal TaAs text January 2019
Experimental Progress on Layered Topological Semimetals text January 2019
Signatures of merging Dirac points in optics and transport text January 2019
Effect of mechanical strain on the optical properties of nodal-line semimetal ZrSiS text January 2019
Advanced Materials and Device Architectures for Magnetooptical Spatial Light Modulators text January 2019

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