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

Srijit Goswami, Christoph Siegert, Michael Pepper, Ian Farrer, David A. Ritchie, and Arindam Ghosh

Phys. Rev. B 83, 073302 – Published 4 February 2011

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.

Received 12 October 2010

DOI:https://doi.org/10.1103/PhysRevB.83.073302

Authors & Affiliations

Srijit Goswami^1,*, Christoph Siegert¹, Michael Pepper^1,†, Ian Farrer¹, David A. Ritchie¹, and Arindam Ghosh²

¹Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
²Department of Physics, Indian Institute of Science, Bangalore 560 012, India

^*sg483@cam.ac.uk
^†Present address: Department of Electronic and Electrical Engineering, University College, London.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 83, Iss. 7 — 15 February 2011

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics