The first observation of contact exclusion in InAs-based p(+)-p-p(+) s
tructures at high temperatures is reported. To identify the process of
nonequilibrium depletion of the base, attesting to exclusion of free
charge carriers, the current-voltage characteristics, the kinetics of
current establishment, and the negative luminescence in the spectral r
egion of interband transitions were investigated. The practical aspect
of this phenomenon is discussed. (C) 1997 American Institute of Physi
cs.