SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 51: Correlated Electrons: Charge Order

TT 51.3: Vortrag

Donnerstag, 30. März 2023, 15:45–16:00, HSZ 103

Kinetic theory of charge-density waves — •Viktor Hahn and Peter Kopietz — Institut für Theoretische Physik, Universität Frankfurt, Max-von-Laue Strasse 1, 60438 Frankfurt, Germany

We present a theoretical study of the dynamics of the collective amplitude and phase modes in the charge-density wave (CDW) state of the electronically quasi one-dimensional material K0.3MoO3 (blue bronze). For this purpose we formulate a kinetic theory using the method of expansion in connected equal-time correlations. Our kinetic equations for the CDW order parameter has the same form as the phenomenological equation of motion obtained within a time-dependent Ginzburg-Landau approach. From the numerical solution of our kinetic equations we extract the frequencies and the damping of the collective amplitude and phase modes in the CDW state. We find that the damping is strongly enhanced when the temperature approaches the critical temperature from below, in agreement with recent experiments.