Author/Authors :
G.A. Khodaparast، نويسنده , , J Kono، نويسنده , , Y.H Matsuda، نويسنده , , S Ikeda، نويسنده , , N Miura، نويسنده , , Y.J Wang، نويسنده , , T Slupinski، نويسنده , , A Oiwa، نويسنده , , H Munekata، نويسنده , , Y Sun، نويسنده , , F.V Kyrychenko، نويسنده , , G.D. Sanders، نويسنده , , C.J. Stanton، نويسنده ,
Abstract :
We report results of experimental and theoretical studies of hole cyclotron resonance (CR) in ferromagnetic InMnAs/GaSb heterostructures. We observe two clear resonances that exhibit strong temperature dependence in position, line width, and intensity, especially near and below the Curie temperature. We attribute the two resonances to the fundamental CR transitions expected for delocalized holes in the valence band in the magnetic quantum limit. Our theoretical calculations, based on an View the MathML source model with s(p)–d exchange interaction taken into account, reproduced temperature-dependent CR peak shifts with decreasing temperature, in qualitative agreement with experiment. We propose that the narrowing is due to the suppression of localized spin fluctuations at low temperature.
