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Direct luminescence evidence for the degenerate electron—hole plasma formation in A II B VI semiconductors
Author(s) -
Brodin M. S.,
Bandura V. M.,
Matsko M. G.
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221190108
Subject(s) - exciton , atomic physics , degenerate energy levels , excitation , luminescence , electron , emission spectrum , semiconductor , plasma , scattering , laser , spectral line , materials science , physics , optics , optoelectronics , condensed matter physics , nuclear physics , quantum mechanics , astronomy
The emission spectra of ZnTe and ZnSe crystals are investigated at T = 4.2 K at high excitation densities by a Coumarin 30 and 120 dye laser. It is shown that for excitation densities R exc > > 0.1 MW/cm 2 the emission spectrum of ZnTe exhibits the P‐band due to inelastic exciton‐exciton scattering. For R exc > 6 MW/cm 2 the emission of a degenerate electron—hole plasma (EHP) is observed. These emission bands may be differentiated by scanning the exciting quanta energy in the short‐wavelength tail region.