SPECTROSCOPY OF INTERFACE STATES IN HGTE HG1-XCDXTE SUPERLATTICES/

Information on interface states in HgTe/Hg1-xCdxTe superlattices has b een obtained via studies of interband transitions in an external magne tic held. Interband transitions can exhibit novel characteristic featu res if interface states are involved. For example, the magnetic field dispersion can be negative at sufficiently small magnetic field streng ths if the initial state is an interface state. We discuss in detail t he influences of the magnetic field strength, the well and barrier thi cknesses, and the temperature on the properties of interband transitio ns involving interface states. (C) 1998 Elsevier Science B.V. All righ ts reserved.