EVOLUTION OF THE INTERBAND ABSORPTION THRESHOLD WITH THE DENSITY OF A2-DIMENSIONAL ELECTRON-GAS

Authors
BROWN SA YOUNG JF BRUM JA HAWRYLAK P WASILEWSKI Z
Citation
Sa. Brown et al., EVOLUTION OF THE INTERBAND ABSORPTION THRESHOLD WITH THE DENSITY OF A2-DIMENSIONAL ELECTRON-GAS, Physical review. B, Condensed matter, 54(16), 1996, pp. 11082-11085
Citations number
22
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
16
Year of publication
1996
Pages
11082 - 11085
Database
ISI
SICI code
0163-1829(1996)54:16<11082:EOTIAT>2.0.ZU;2-T
Abstract
We have obtained absolute interband absorption spectra from a series o f modulation-doped GaAs/Al0.3Ga0.7As multiple quantum wells covering a wide range of two-dimensional electron densities. The evolution of th e threshold line shape from an exciton to a Fermi-edge singularity is quantified. We discuss the influence of the doubly occupied bound stat e (X(-)) on the line shape and compare the results with realistic many -body calculations.