Directed transport in quantum Hall bilayers

R. Khomeriki (), L. Tkeshelashvili, T. Buishvili and Sh. Revishvili

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 51, issue 3, 421-424

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. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 73.43.Lp Collective excitations; 05.45.Yv Solitons (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00234-6

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