Double hole cyclotron resonance in zero-gap HgTe-CdTe superlattices

Abstract
Magnetic-field-dependent band structures for HgTe-CdTe superlattices with zero band gap have been calculated by the transfer-matrix method. We find that there is an unusual mixing of cyclotron resonance and interband transitions. The analysis predicts that the hole cyclotron resonance should display two peaks corresponding to transitions in different regions of the Brillouin zone. Agreement with recent data showing a double peak in the Faraday geometry is quite good.