Dynamical terahertz spectroscopy of three-dimensional Dirac semimetal Cd<sub>3</sub>As<sub>2</sub>
ORAL
Abstract
Three-dimensional Dirac semimetal Cd3As2 has drawn attention for its extremely mobile carriers and unique infrared response. Moreover, Dirac semimetals, with symmetry protected Dirac nodes, are predicted to display novel low-frequency behavior that deviates from the conventional metal/semiconductor or a 2D Dirac semimetal picture. Nonlinearities of the low-energy terahertz response observed in Cd3As2 demand a holistic understanding. We probe the dynamical broadband terahertz response in this material upon photoexcitation and also discuss some terahertz nonlinear effects.
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Presenters
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Varun Ramaprasad
University of California, San Diego, University of California San Diego
Authors
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Varun Ramaprasad
University of California, San Diego, University of California San Diego
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Yuan Zhang
University of California, San Diego
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Alexander C Lygo
University of California Santa Barbara
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Sheikh Rubaiat Ul Haque
University of California, San Diego
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Kelson Kaj
University of California, San Diego
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Susanne Stemmer
University of California, Santa Barbara
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Richard D Averitt
University of California, San Diego