Temperature and density dependence of inversion electron cyclotron resonance in InSb

Abstract

Cyclotron resonance (CR) in inversion layers on p-InSb has been measured at laser energies h(cross) omega =10.4 and 26.6 meV as a function of temperature (T approximately=4-200K) and inversion electron density (n5 approximately=0.2-2*1012 cm-2) to investigate the CR lineshape. In particular, the authors study quantum oscillations and their influence on sub-band CR. They find that quantum oscillations show the same periodicity and temperature dependence as the corresponding Shubnikov-de Haas oscillations of the static conductivity. The experimental peak position of sub-band CR is not significantly (<or approximately=5%) affected by quantum oscillations. Cyclotron masses can most reliably be extracted at elevated temperatures (T approximately=50K) when the oscillations are smeared out.