Shubnikov–de Haas measurements on <i>n</i>- and <i>p</i>-type HgTe-CdTe superlattices

Abstract

Oscillatory magnetoresistance (Shubnikov–de Haas) measurements have been used to determine free-carrier effective masses in HgTe-CdTe superlattices. Measurements on an n-type superlattice yield an electron mass that is in excellent agreement with theoretical results from a tight-binding band-structure calculation. The p-type data are more complex, showing evidence for a light-hole mass at low magnetic fields and a much heavier mass at fields above 2.0 T. This finding is also in agreement with the predictions of band-structure theory.