Observation of sharp collective excitations of the one-dimensional electron gas in cleaved-edge-overgrown semiconductor quantum wires

J. Rubio, J. M. Calleja, A. Pinczuk, B. S. Dennis, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Coulomb interactions in a dilute one-dimensional (1D) electron system in high quality cleaved-edge overgrown GaAs quantum wires are probed by optics experiments. Intra-subband collective excitation modes are observed in resonant inelastic light-scattering spectra. A sharp intra-subband excitation occurs close to the single particle transition energy. It is narrower and weaker than the plasmon band, and its width is consistent with electron mean free paths in the micrometer range. Scattering intensities display large enhancements only for scattered photon energies in resonance with the optical gap of the wires. Preliminary analysis reveals impact of interactions in the 1D system. Possible interpretation in terms of Luttinger-liquid bosons is discussed.

Original languageEnglish (US)
Pages (from-to)149-153
Number of pages5
JournalSolid State Communications
Volume125
Issue number3-4
DOIs
StatePublished - Jan 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

Keywords

  • A. Electron gas
  • A. Semiconductors
  • E. Inelastic light-scattering

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