Light scattering determination of roton densities of states in two-dimensional landau level excitations

A. Pinczuk, J. P. Valladares, D. Heiman, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We report the observation of inelastic light scattering by large wavevector inter-Landau level excitations of the 2D electron gas in a perpendicular magnetic field. In results from very high electron mobility single GaAs quantum wells we find evidence of excitonic binding and roton minima predicted by Hartree-Fock calculations. Massive breakdown of wavevector conservation due to residual disorder allows this insight into Coulomb interactions.

Original languageEnglish (US)
Pages (from-to)384-387
Number of pages4
JournalSurface Science
Volume229
Issue number1-3
DOIs
StatePublished - Apr 2 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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