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The fine structure of cyclotron and spin resonances at their crossing:interplay between spin-orbit and Coulomb interactions

Falko, Vladimir (1993) The fine structure of cyclotron and spin resonances at their crossing:interplay between spin-orbit and Coulomb interactions. Journal of Physics: Condensed Matter, 5 (46). pp. 8725-8740. ISSN 0953-8984

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Abstract

We compare the anticrossing of the spin and cyclotron resonances in spin-polarized and non-polarized phases of a two-dimensional electron gas subjected to a strong tilted magnetic field. The spin-orbit coupling splits these resonances into three lines with the gaps between them exactly equal to delta2n+1 = upsilon(so)pF and delta2n = upsilon(so)pF/square-root 2 at odd- and even-integer factors, respectively. The 1/square-root 2 factor difference between the gaps delta2n and delta2n+1 arises from the existence of two collective spin-wave-density modes in the polarized phase of interacting electrons in the system with two filled Landau levels. This allows us to predict a new type of spectral Shubnikov-de Haas oscillations, which indicates the re-entrance of the system into the spin-polarized state.

Item Type: Article
Journal or Publication Title: Journal of Physics: Condensed Matter
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 57087
Deposited By: ep_importer_pure
Deposited On: 05 Sep 2012 17:44
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 09:43
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57087

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