Abstract
Anomalous electrical properties have been observed in CdxHg1−xTe films grown on GaAs substrates by MBE at elevated temperature. The anomalies are manifested in the conductivity anisotropy, modifications of the transmission and photoconductivity spectra upon low-temperature annealing, and the existence of a periodic undulatory surface microprofile. The temperature dependence of conductivity along and across the microprofile waves has been studied. It is suggested that a CdxHg1−xTe film with anomalous electrical properties is a spontaneously formed periodic structure in the form of vertical nanowalls of different compositions. Possible mechanisms for the formation of such a structure are discussed.
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