SKM 2023 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 51: Correlated Electrons: Charge Order

TT 51.4: Talk

Thursday, March 30, 2023, 16:00–16:15, HSZ 103

Collective modes in the quasi one-dimensional charge-density wave material blue bronze — •Max Oberon Hansen — Goethe University, Frankfurt am Main, Germany

We calculate the spectrum of collective modes (amplitude, phase, phonon, and plasmon) in the charge-density wave state of the quasi-one dimensional metal K_0.3MoO₃, named blue bronze. Using a functional integral approach we derive effective actions for the different types of collective modes in Gaussian approximation and compare our results with experiments. Our approach emphasizes the role of acoustic phonons to guarantee that the phase mode remains gapless in the presence of long-range Coulomb interactions.