VALENCE-BAND PARAMETERS FOR HG1-XMGXTE EPITAXIAL LAYERS

Temperature dependent magneto-optical investigations of Hg1-xMgxTe epi taxial layers were performed in the infrared regime to determine the v alence band parameters in the framework of the quasi-germanium model. The sample alloy composition of x = 0.07 +/- 0.01 was chosen such that both the semimetallic and the semiconducting regimes could be studied in our experimental temperature interval. Analyzing the positions of electron cyclotron resonances and various interband transitions, the b and parameters were determined in both regimes. Very good agreement be tween experiment and theory is obtained with temperature independent v alence band parameters. (C) 1998 Published by Elsevier Science B.V. Al l rights reserved.