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APS » Journals » Phys. Rev. B » Volume 55 » Issue 23
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Phys. Rev. B 55, 15423–15426 (1997)

Light scattering from a periodically modulated two-dimensional electron gaswith partially filled Landau levels

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Arne Brataas
Department of Physics, Norwegian University of Science and Technology, N-7034 Trondheim, Norway

C. Zhang
Department of Physics, University of Wollongong, New South Wales 2522, Australia

K. A. Chao
Department of Physics, Norwegian University of Science and Technology, N-7034 Trondheim, Norway
and Department of Theoretical Physics, Lund University, S-223 26 Lund, Sweden

Received 19 December 1996; published in the issue dated 15 June 1997

We study light scattering from a periodically modulated two-dimensional electron gas in a perpendicular magnetic field. If a subband is partially filled, the imaginary part of the dielectric function as a function of frequency contains additional discontinuities to the case of completely filled subbands. The positions of the discontinuities may be determined from the partial filling factor and the height of the discontinuity can be directly related to the modulation potential. The light-scattering cross section contains a peak which is absent for integer filling.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.15423
DOI:
10.1103/PhysRevB.55.15423
PACS:
73.20.Mf, 78.30.-j
 
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