Fermi-energy-edge singularity in quantum wells containing more than one occupied subband

MS Skolnick; DM Whittaker; PE Simmonds; TA Fisher; MK Saker; JM Rorison; RS Smith; PB Kirby; CRH White

doi:10.1103/PhysRevB.43.7354

Fermi-energy-edge singularity in quantum wells containing more than one occupied subband

MS Skolnick, DM Whittaker, PE Simmonds, TA Fisher, MK Saker, JM Rorison, RS Smith, PB Kirby, CRH White

Department of Electrical & Electronic Engineering

Research output: Contribution to journal › Article (Academic Journal) › peer-review

52 Citations (Scopus)

Abstract

A study of the Fermi-energy-edge singularity in asymmetric modulation-doped quantum wells is reported. It is shown that high densities of free carriers in filled n=1 electron subbands have no significant influence on the edge singularity in partly occupied n=2 subbands, demonstrating the weakness of intersubband Coulomb-scattering processes. The enhancement of oscillator strength at the Fermi energy is of very similar magnitude to that for excitonic transitions in undoped quantum wells

Translated title of the contribution	Fermi-energy-edge singularity in quantum wells containing more than one occupied subband
Original language	English
Pages (from-to)	7354 - 7357
Number of pages	4
Journal	Physical Review B: Condensed Matter
Volume	43 (9)
DOIs	https://doi.org/10.1103/PhysRevB.43.7354
Publication status	Published - Mar 1991

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title = "Fermi-energy-edge singularity in quantum wells containing more than one occupied subband",

abstract = "A study of the Fermi-energy-edge singularity in asymmetric modulation-doped quantum wells is reported. It is shown that high densities of free carriers in filled n=1 electron subbands have no significant influence on the edge singularity in partly occupied n=2 subbands, demonstrating the weakness of intersubband Coulomb-scattering processes. The enhancement of oscillator strength at the Fermi energy is of very similar magnitude to that for excitonic transitions in undoped quantum wells",

author = "MS Skolnick and DM Whittaker and PE Simmonds and TA Fisher and MK Saker and JM Rorison and RS Smith and PB Kirby and CRH White",

year = "1991",

month = mar,

doi = "10.1103/PhysRevB.43.7354",

language = "English",

volume = "43 (9)",

pages = "7354 -- 7357",

journal = "Physical Review B: Condensed Matter",

issn = "0163-1829",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - Fermi-energy-edge singularity in quantum wells containing more than one occupied subband

AU - Skolnick, MS

AU - Whittaker, DM

AU - Simmonds, PE

AU - Fisher, TA

AU - Saker, MK

AU - Rorison, JM

AU - Smith, RS

AU - Kirby, PB

AU - White, CRH

PY - 1991/3

Y1 - 1991/3

N2 - A study of the Fermi-energy-edge singularity in asymmetric modulation-doped quantum wells is reported. It is shown that high densities of free carriers in filled n=1 electron subbands have no significant influence on the edge singularity in partly occupied n=2 subbands, demonstrating the weakness of intersubband Coulomb-scattering processes. The enhancement of oscillator strength at the Fermi energy is of very similar magnitude to that for excitonic transitions in undoped quantum wells

AB - A study of the Fermi-energy-edge singularity in asymmetric modulation-doped quantum wells is reported. It is shown that high densities of free carriers in filled n=1 electron subbands have no significant influence on the edge singularity in partly occupied n=2 subbands, demonstrating the weakness of intersubband Coulomb-scattering processes. The enhancement of oscillator strength at the Fermi energy is of very similar magnitude to that for excitonic transitions in undoped quantum wells

U2 - 10.1103/PhysRevB.43.7354

DO - 10.1103/PhysRevB.43.7354

M3 - Article (Academic Journal)

VL - 43 (9)

SP - 7354

EP - 7357

JO - Physical Review B: Condensed Matter

JF - Physical Review B: Condensed Matter

SN - 0163-1829

ER -

Fermi-energy-edge singularity in quantum wells containing more than one occupied subband

Abstract

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