Signatures of an anomalous Nernst effect in a mesoscopic two-dimensional electron system

Goswami, Srijit and Siegert, Christoph and Pepper, Michael and Farrer, Ian and Ritchie, David A and Ghosh, Arindam (2011) Signatures of an anomalous Nernst effect in a mesoscopic two-dimensional electron system. In: Physical Review B: Condensed Matter and Materials Physics, 83 (7).

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Abstract

We investigate the Nernst effect in a mesoscopic two-dimensional electron system (2DES) at low magnetic fields, before the onset of Landau level quantization. The overall magnitude of the Nernst signal agrees well with semiclassical predictions. We observe reproducible mesoscopic fluctuations in the signal that diminish significantly with an increase in temperature. We also show that the Nernst effect exhibits an anomalous component that is correlated with an oscillatory Hall effect. This behavior may be able to distinguish between different spin-correlated states in the 2DES.

Item Type:	Journal Article
Publication:	Physical Review B: Condensed Matter and Materials Physics
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	12 Apr 2011 10:07
Last Modified:	12 Apr 2011 10:07
URI:	http://eprints.iisc.ac.in/id/eprint/35983

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