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O: Fachverband Oberflächenphysik
O 122: Topology and Symmetry Protected Materials II
O 122.5: Vortrag
Freitag, 20. März 2020, 11:30–11:45, WIL A317
Terahertz driven nonequilibrium dynamics of Dirac fermions in Cd3As2 — •Semyon Germanskiy, Chris Reinhoffer, Paul H. M. van Loosdrecht, and Zhe Wang — Institute of Physics II, University of Cologne, 50937 Cologne, Germany
Cd3As2 is a well-established three-dimensional Dirac semimetal material with intriguing non-linear and nonequilibrium dynamical properties. By using intense terahertz pump pulses, we study the driven dynamics of Dirac fermions in Cd3As2 with various probe techniques. Particularly, we observe a very efficient generation of terahertz high-order harmonics, which reflects the unconventional nonequilibrium dynamical properties and is associated with the characteristic linear dispersion relation of the Dirac fermions.