The recombination radiation line of surface two-dimensional electrons
and nonequilibrium holes is observed in electroluminescence spectra of
tunneling [100] silicon MOS diodes under tunneling injection of holes
at T = 1.5 K. The tunneling current and electroluminescence in these
structures are bistable due to existence of two ways of the hole injec
tion. (C) 1997 Elsevier Science Ltd.