Direct Observation of CuLevels in I-III-Compounds
- 23 October 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 29 (17), 1162-1164
- https://doi.org/10.1103/physrevlett.29.1162
Abstract
We report the direct observation of transitions from the Cu levels in the valence band of CuIn. The fivefold degeneracy is completely lifted by spin-orbit interaction and the tetragonal crystal field in this chalcopyrite compound. From the observed polarization dependences, the symmetry of each of the five levels is determined. We show that a recent energy-band calculation ignoring levels is unable to account for the structure of the uppermost valence bands in I-III- compounds.
Keywords
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