Core x-ray spectra in semiconductors and the Mahan-Nozieres-De Dominicis model

Livins, Peteris

doi:10.1103/physrevb.58.10484

Cited by 2 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5,9 In quasi-2D systems with a finite-mass hole, the appearance of a FES has been discussed theoretically, where confining and artificial potentials must be taken into account by a 2D electron-hole attractive Coulomb interaction which is weakened by a form factor, 10 and the balance between the electron-hole Coulomb interaction and Anderson's orthogonality theorem is more subtle. 11 The disappearance of the FES was theoretically predicted by some, [12][13][14] while Bauer calculated a significant oscillator strength in PL near E F below a critical electron density. 15 Experimentally, the FES was observed in absorption spectra, [16][17][18] but only a weak structure was observed near the Fermi energy (E F ) in the photoluminescence spectra.…”

Section: Introductionmentioning

confidence: 95%

Fermi-edge singularities in photoluminescence spectra ofn-type modulation-doped quantum wells with a lateral periodic potential

2001

View full text Add to dashboard Cite

We demonstrate that a many-body effect between electrons and a finite-mass hole can be modulated externally by lateral periodic potentials in a n-type modulation-doped GaAs-Ga 1Ϫx Al x As quantum-well structure. A peculiar asymmetric peak is observed in the photoluminescence spectra 2.5 meV below the Fermi energy when a weak lateral periodic potential is applied, whereas no significant feature is observed without any lateral potential. The asymmetric peak is shown to be due to the recombination of the electrons at the Fermi surface and a hole, by investigating the oscillations of the energy positions and the intensity of the emission spectrum as a function of the magnetic field.

show abstract