Quantum cyclotron resonance of two-dimensional holes in the Ge layers of Ge-Ge1−xSix heterostructures

Quantum cyclotron resonance of two-dimensional holes in strained germanium layers of the periodic heterostructure Ge-Ge1−xSix has been observed and investigated for the first time. The results are compared with the data of electrophysical measurements in strong magnetic fields. A clear dependence of the magnitude of the longitudinal effective mass of the holes on the absolute magnitude of the elastic deformation of the germanium layers (splitting energy of the hole subbands) is observed.