Angle-resolved photoemission spectroscopy of Hg1−xCdxTe

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Abstract
Angle-resolved photoemission spectroscopy, a technique which provides direct information on the quantum numbers k and E which characterize the electron states in a periodic solid, has been used to study the electronic structure of the alloy Hg1−xCdxTe for x=1.0, 0.31, 0.23, and 0.0. Data were collected mainly for emission along the normal to the cleaved (110) face of these crystals as a function of photon energy with various directions of polarization. The structure observed in the spectra of the alloy are similar in dispersion and polarization dependence to that obtained for CdTe. Preliminary analysis of the observed features using a free electron final state reveals the bulk origin of the measured transitions by comparison to calculated valence bands and elucidates aspects of the composition dependence of the valence band states involved in the optical excitation.

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