Observation of large many-body Coulomb interaction effects in a doped quantum wire

Hidefumi Akiyama, Loren N. Pfeiffer, Aron Pinczuk, Ken W. West, Masahiro Yoshita

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


We demonstrate strong one-dimensional (1D) many-body interaction effects in photoluminescence (PL) in a GaAs single quantum wire of unprecedented optical quality, where 1D electron plasma densities are controlled via electrical gating. We observed PL of 1D charged excitons with large binding energy of 2.3 meV relative to the neutral excitons, and its evolution to a Fermi-edge singularity at high electron density. Furthermore, we find a strong band-gap renormalization in the 1D wire, or a large red-shift of PL with increased electron plasma density. Such a large PL red-shift is not observed when we create a high density neutral electron-hole plasma in the same wire, due probably to cancellation of the Coulomb interaction energy in the neutral plasma.

Original languageEnglish (US)
Pages (from-to)169-173
Number of pages5
JournalSolid State Communications
Issue number3-4
StatePublished - Apr 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


  • Band-gap renormalization
  • Charged exciton
  • Luminescece
  • Quantum wire


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