Optical Signatures of Weyl Points in TaAs

Abstract

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 width of the Drude peak decreases upon cooling, following a $T^2$ temperature dependence which is expected for Weyl semimetals. Two linear components with distinct slopes dominate the 5-K optical conductivity. A comparison between our experimental results and theoretical calculations suggests that the linear conductivity below $\sim$230~cm${}^{-1}$ is a clear signature of the Weyl points lying in very close proximity to the Fermi energy.

5 pages, 4 figures

References in corpus (37)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Weyl Semimetal in a Topological Insulator Multilayer
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Fermi-liquid instabilities at magnetic quantum phase transitions
• Experimental discovery of Weyl semimetal TaAs
• Measurement of the Optical Conductivity of Graphene
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Observation of Weyl nodes in TaAs
• Observation of the chiral magnetic effect in ZrTe5
• Discovery of a Weyl Fermion semimetal state in NbAs
• Signatures of the Adler-Bell-Jackiw chiral anomaly in a Weyl Fermion semimetal
• Recent developments in transport phenomena in Weyl semimetals
• Charge Transport in Weyl Semimetals
• Weyl semimetal with broken time reversal and inversion symmetries
• Topological and magnetic phases of interacting electrons in the pyrochlore iridates
• Time-reversal invariant realization of the Weyl semimetal phase
• Observation of Weyl nodes and Fermi arcs in TaP
• Transition-Metal Pentatelluride ZrTe${}_5$ and HfTe${}_5$: a Paradigm for Large-gap Quantum Spin Hall Insulators
• Weyl semimetals from noncentrosymmetric topological insulators
• Optical spectroscopy study of three dimensional Dirac semimetal ZrTe${}_5$
• Chiral anomaly and optical absorption in Weyl semimetals
• Three-dimensional Dirac fermions in quasicrystals as seen via optical conductivity
• Fermi arc topology and interconnectivity in Weyl fermion semimetals TaAs, TaP, NbAs, and NbP
• Topological electronic structure and Weyl semimetal in the TlBiSe${}_2$ class of semiconductors
• Magnetotransport of single crystalline YSb
• Magnetotransport of single crystalline NbAs
• Electron-hole compensation effect between topologically trivial electrons and nontrivial holes in NbAs
• Observation of the Adler-Bell-Jackiw chiral anomaly in a Weyl semimetal
• Low frequency optical conductivity in graphene and in other scale-invariant two-band systems
• Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with suppressed superconductivity in LiFe${}_{1-x}$Co${}_x$As
• Raman study of lattice dynamics in Weyl semimetal TaAs

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