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Inelastic Light Scattering from a Two‐Dimensional Electron Gas at Large Filling Factors
Author(s) -
Richards D.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199909)215:1<353::aid-pssb353>3.0.co;2-o
Subject(s) - wave vector , raman scattering , inelastic scattering , landau quantization , scattering , condensed matter physics , magnetic field , physics , x ray raman scattering , raman spectroscopy , fermi gas , electron , mott scattering , optics , small angle neutron scattering , quantum mechanics , neutron scattering
We present the results of Raman scattering measurements of a high‐density two‐dimensional electron gas in the presence of a magnetic field, for filling factors >6. Inter‐Landau excitations up to Δ n = 7 were observed, which we attribute to non‐wavevector conserving Raman scattering. In addition, for measurements at finite wavevector, wavevector conserving Raman scattering is observed from Bernstein modes. Excellent agreement is obtained between experiment and theory for the magnetic‐field dependence of the inter‐Landau level and the charge‐density excitations.