Eur. Phys. J. B 51, 421-424 (2006)
https://doi.org/10.1140/epjb/e2006-00234-6

Directed transport in quantum Hall bilayers

¹ Department of Natural Sciences, Tbilisi State University, Chavchavadze ave. 3, Tbilisi, 0128, Georgia
² Institut für Theoretische Festkörperphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
³ Institute of Physics, Tamarashvili str. 6, Tbilisi, 0177, Georgia

Corresponding author: ^a khomeriki@hotmail.com

Received: 23 January 2006
Revised: 1 May 2006
Published online: 13 June 2006

Abstract

The pseudo-spin model for a double layer quantum Hall system with the total landau level filling factor ν=1 is discussed. In contrast to the “traditional” model where the interlayer voltage enters as a static magnetic field along pseudo-spin hard axis, taking into account the realistic experimental situation, in our model we interpret the influence of applied voltage as a source of additional relaxation process in the double layer system. We show that the Landau-Lifshitz equation for the considered pseudo-magnetic system well describes existing experimental data and reduces to the dc driven and damped sine-Gordon equation. As a result, the mentioned model predicts novel directed intra-layer transport phenomenon in the system. In particular, unidirectional intra-layer energy transport can be realized due to the motion of topological kinks induced by applied voltage. Experimentally this should be manifested as counter-propagating intra-layer inhomogeneous charge currents proportional to the interlayer voltage and total topological charge of the pseudo-spin system.