Subband Renormalization in the Presence of a Dense Electron-Hole Plasma in a Quantum-Well

We calculate the shrinkage of the gaps between the two lowest subbands in a quantum well induced by the presence of a photo-excited electron-hole plasma. The results are reported as a function of well width and plasma concentration. The reduction of the higher gaps is found to be almost as strong as that of the fundamental gap. The contribution of the so called 'off-diagonal' terms is shown to be important.


Published in:
Solid State Communications, 80, 7, 473-476
Year:
1991
ISSN:
0038-1098
Keywords:
Note:
Ecole polytech fed lausanne,ph ecublens,inst phys appl,ch-1015 lausanne,switzerland. Bongiovanni, g, univ cagliari,dipartimento sci fis,via osped 72,i-09124 cagliari,italy.
ISI Document Delivery No.: GR863
Times Cited: 4
Cited Reference Count: 16
Cited References:
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