12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > The fine structure of cyclotron and spin resona...
View graph of relations

« Back

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

Research output: Contribution to journalJournal article

Published

Journal publication date15/11/1993
JournalJournal of Physics: Condensed Matter
Journal number46
Volume5
Number of pages16
Pages8725-8740
Original languageEnglish

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.