DONOR SPECTROSCOPY IN HG1-XCDXTE AT HIGH MAGNETIC-FIELDS

Far-infrared magnetotransmission studies of n-type Hg1-xCdxTe (0.2<x<0.3) are reported for temperatures down to 1.5 K and magnetic fields up to 9 T in Voigt and Faraday geometries. Magneto-optical transitions of donor-bound electrons are observed, including the [000][001] and [01»0][01»kz] transitions in the Voigt geometry, and the [000][110] transition in the Faraday geometry. These identifications are confirmed by the resonance positions, selection rules, and temperature dependence. The experimental observations are consistent with calculations of resonance positions and line shapes based on the hydrogenic donor model including central-cell effects and band nonparabolicity. This work confirms the donor-boundelectronic ground state for n-type Hg1-xCdxTe. © 1990 The American Physical Society.