Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.8: Poster

Mittwoch, 29. März 2006, 14:30–18:30, P1

Collective modes in electron Fermi-liquid of organic layered conductors — •Dmitrii Stepanenko, Olga Kirichenko, and Valentin Peschansky — B.I.Verkin Institute for Low Temperature Physics and Engineering,

We have studied theoretically the propagation of electromagnetic waves in organic layered conductors at low temperature, when the charge carriers mean free path is the largest parameter of the dimensionality of length. It is shown that the specific of the Q2D charge carriers energy spectrum in layered conductors results in the oscillatory dependence of the electron drift velocity v_D upon the angle θ between the magnetic field vector and the normal to the layers. In a strong magnetic field, when the cyclotron frequency of electrons is much greater than their collision frequency, for the entire series of the values θ=θ_c the velocity v_D is vanishingly small everywhere at the Fermi surface. This is the case when the collisionless absorption of the wave is absent and propagation of weakly damping modes is possible for an arbitrary orientation of the wave vector. The spectrum of the collective modes have been analyzed with regard to the Fermi liquid interaction between electrons.