SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 48: Ultra-fast Phenomena
HL 48.9: Vortrag
Freitag, 31. März 2023, 11:45–12:00, POT 251
Potential signatures of hydrodynamic transport captured by THz high harmonic generation — •Tim Priessnitz1, Thales de Oliveira2, Liwen Feng1,3, Min-Jae Kim1,3, Sergey Kovalev2, Bernhard Keimer1, and Stefan Kaiser1,3 — 1Max-Planck Institute for Solid State Research, 70569 Stuttgart, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 3Institute of Solid State and Materials Physics, Technical University Dresden, 01069 Dresden, Germany
Terahertz high harmonic generation (THz HHG) is a common property of nonlinear systems. Recently it has been used to investigate fundamental principles that govern transport and nonlinear dynamics in novel quantum materials like graphene or Dirac semimetals. However, these studies have not yet been successfully extended to low temperatures where hydrodynamic effects come into play. Optical phenomena such as THz HHG are proposed to provide a more efficient way to probe hydrodynamic effects than previously studied DC transport measurements, which identified the delafossite PdCoO2 as a candidate to observe such properties. Here, we report on THz HHG in thin films of PdCoO2 at low temperatures and we will discuss potential signatures of hydrodynamics, contributing to the ongoing puzzle of low-temperature origins of THz HHG.