MANY-BODY AND DISORDER EFFECTS IN THE OPTICAL-SPECTRA OF EXTREMELY HIGH-DENSITY BE DELTA-DOPED GAAS

Authors
FRITZE M KASTALSKY A CUNNINGHAM JE KNOX WH PATHAK RN PERAKIS IE
Citation
M. Fritze et al., MANY-BODY AND DISORDER EFFECTS IN THE OPTICAL-SPECTRA OF EXTREMELY HIGH-DENSITY BE DELTA-DOPED GAAS, Solid state communications, 100(7), 1996, pp. 497-501
Citations number
25
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
100
Issue
7
Year of publication
1996
Pages
497 - 501
Database
ISI
SICI code
0038-1098(1996)100:7<497:MADEIT>2.0.ZU;2-9
Abstract
We study the highly degenerate hole gas found in extremely high densit y Be delta-doped GaAs (n(s) approximate to 10(14) cm(-2)). Sharp excit onic-like features (Fermi-edge singularities), dominate the luminescen ce spectrum at low temperatures and remarkably coexist with a high deg ree of disorder evidenced by large, temperature independent Urbach tai ls and low mobilities. This observation coincides with a transition to self-organized clustered Be growth and the population of additional h ole subbands. Copyright (C) 1996 Published by Elsevier Science Ltd