OBSERVATION OF MANY-BODY EFFECTS AND BAND-GAP RENORMALIZATION IN LOW-DIMENSIONAL SYSTEMS WITH BUILT-IN PIEZOELECTRIC FIELDS

Authors
MOORE KJ BORING P GIL B WOODBRIDGE K
Citation
Kj. Moore et al., OBSERVATION OF MANY-BODY EFFECTS AND BAND-GAP RENORMALIZATION IN LOW-DIMENSIONAL SYSTEMS WITH BUILT-IN PIEZOELECTRIC FIELDS, Physical review. B, Condensed matter, 48(24), 1993, pp. 18010-18015
Citations number
59
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
48
Issue
24
Year of publication
1993
Pages
18010 - 18015
Database
ISI
SICI code
0163-1829(1993)48:24<18010:OOMEAB>2.0.ZU;2-B
Abstract
We Show that many-body effects and band-gap renormalization can be eas ily produced in strained-layer quantum wells with internal built-in pi ezoelectric fields, under photoexcitation. Our observation was made at low temperature by comparing the behavior of Ga0.92In0.08As-GaAs stra ined-layer quantum wells grown along the (111) and (001) directions an d tuning the densities of photoinjected carriers over several decades. Comparison between experimental data and the results of Hartree-calcu lations including the charge space effects-reveals that many-body inte ractions are photoinduced.