Observation of Impurity Cyclotron Resonance inHg1−xCdxTe

Abstract

Impurity cyclotron resonance (ICR) has been observed in $n-{\mathrm{Hg}}_{1-x}{\mathrm{Cd}}_x\mathrm{Te}$. This experiment provides conclusive evidence for donor-bound electrons in this semiconductor. The separation between the ICR and the free-carrier resonance is in satisfactory agreement with theoretical predictions for hydrogenic donors in a strong magnetic field. Saturation of the ICR absorption was used to determine the electron lifetimes of Å ${10}^{-6\mathrm{}}$ sec in the lowest Landau level.