T. Ferid et al., ELECTRICAL-PROPERTIES OF HG1-XCDXTE GROWN BY LOW-TEMPERATURE METALORGANIC VAPOR-PHASE EPITAXY, JPN J A P 1, 33(12A), 1994, pp. 6481-6485
Electrical properties of Hg1-xCdxTe layers grown by low-temperature me
talorganic vapor phase epitaxy at 275 degrees C have been studied. Sub
strates used were (100) GaAs. The precursors used were dimethylcadmium
(DM Cd), elemental mercury, and ditertiarybutyltelluride. Cadmium com
position a: of the layers was controlled from 0 to 1 by DMCd flow. Van
der Pauw measurements were carried out in the temperature range from
25 to 300 K. For HgTe layers, typical 80 K electron concentration and
Hall mobility of 4.4 x 10(16) cm(-3) and 8.0 x 10(4) cm(2)/V . s were
obtained. For CdTe, 300 K hole concentration and hole Hall mobility of
1.2 x 10(15) cm(-3) and 6.5 x 10(1) cm(2)/V . s were obtained. In the
intermediate Cd composition region of x=0.44, 80 K electron concentra
tion of 8.0 x 10(15) cm(-3) and Hall mobility as high as 7.4 x 10(3) c
m(2)/V . s were also obtained. The experimental mobilities were explai
ned by polar-optical phonon and alloy scattering.