Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The fine structure of cyclotron and spin resonances at their crossing
T2 - interplay between spin-orbit and Coulomb interactions
AU - Falko, Vladimir
PY - 1993/11/15
Y1 - 1993/11/15
N2 - 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.
AB - 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.
U2 - 10.1088/0953-8984/5/46/010
DO - 10.1088/0953-8984/5/46/010
M3 - Journal article
VL - 5
SP - 8725
EP - 8740
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 46
ER -