Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.36: Poster

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

Hall effect in quasi-two-dimensional conductors — •Valentin G. Peschansky¹ and Raed Hasan² — ¹B.I.Verkin institute for low temperature and Egineering, 61103 Kharkov, Ukraine — ²V.N.Karazin Kharkov national university, 4 Svoboda sq., 61077 Kharkov, Ukraine

Galvanomagnetic phenomena have been studied theoretically in layered conductors with a quasi-two-dimensional electron energy spectrum of an arbitrary form in a strong magnetic field B. At low enough temperature, when the smearing of the Fermi distribution function for charge carriers is much less than the separation between quantized Landau levels the Hall field oscillates with 1/B. It is shown that in conductors with the Fermi surface consisting of topologically different elements the amplitude of quantum oscillations of the Hall field is sufficiently large and comparable to the amplitude of the Shubnikov-de Haas magnetoresistance oscillations. In the case when the Fermi surface has the form of a single corrugated cylinder there are no quantum corrections to the Hall field in the collisoinless limit. Experimental studies of the Hall field along with the B-dependence of the magnetoresistance at different orientations of the magnetic field permits one to restore the Fermi surface completely.