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Breaking of Larmor's theorem in quantum Hall states with spin-orbit coupling

Califano, M., Chakraborty, T., Pietiläinen, P. and Hu, C.M. (2006) Breaking of Larmor's theorem in quantum Hall states with spin-orbit coupling. Physical Review B, 73 (11). Art. No. 113315. ISSN 1550-235x

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We investigate the effect of spin-orbit (SO) interaction on the long-wavelength collective spin excitation in a two-dimensional electron gas in the fractional quantum Hall regime. The many-body correction to the single-particle electron spin resonance (ESR) energy is found to be nonzero, providing theoretical evidence of a breaking of Larmor's theorem. Such breaking is due to the loss of spin-rotational invariance introduced by the SO-induced structural inversion asymmetry in the system. This effect, whose magnitude is a significant percentage of the single-particle ESR, exhibits remarkable features in a wide range of experimentally relevant parameters and is found to be nearly material independent.

Item Type: Article
Copyright, Publisher and Additional Information: © 2006 The American Physical Society. This is an author produced version of a paper published in Physical Review B. Uploaded in accordance with the publisher's self archiving policy.
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User: Sherpa Assistant
Date Deposited: 14 Aug 2008 15:03
Last Modified: 08 Feb 2013 17:05
Published Version: http://dx.doi.org/10.1103/PhysRevB.73.113315
Status: Published
Publisher: American Physical Society
Refereed: Yes
Identification Number: 10.1103/PhysRevB.73.113315
URI: http://eprints.whiterose.ac.uk/id/eprint/4324

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