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:
Journal Article
Journal or Publication Title:
Journal of Physics: Condensed Matter
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57087
Deposited By:
Deposited On:
05 Sep 2012 16:44
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:04