arXiv subjects

T. Ikaida

Publications and source records attributed to T. Ikaida.

2 recordsLinked to original sources

arXiv2002

Cyclotron Resonance of Itinerant Holes in Ferromagnetic InMnAs/GaSb Heterostructures

We report the first observation of hole cyclotron resonance (CR) in ferromagnetic InMnAs/GaSb heterostructures both in the high-temperature paramagnetic phase and the low-temperature ferromagnetic phase. We clearly resolve two resonances that exhibit strong temperature dependence in position, linewidth, and intensity. We attribute the two resonances to the so-called fundamental CR transitions expected for delocalized holes in the valence band in the magnetic quantum limit, demonstrating the existence of $p$-like itinerant holes that are describable within the Luttinger-Kohn effective mass theory.

cond-mat.mtrl-sci↗

arXiv2002

Ultrahigh field electron cyclotron resonance absorption in In$_{1-x}$Mn$_x$As films

We have carried out an ultrahigh field cyclotron resonance study of $n$-type In$_{1-x}$Mn$_x$As films, with Mn composition $x$ ranging from 0 to 12%, grown on GaAs by low temperature molecular beam epitaxy. We observe that the electron cyclotron resonance peak shifts to lower field with increasing $x$. A detailed comparison of experimental results with calculations based on a modified Pidgeon-Brown model allows us to estimate the {\em s-d} and {\em p-d} exchange coupling constants, $α$ and $β$, for this important III-V dilute magnetic semiconductor system.

cond-mat.mtrl-sci↗