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Author Gudmundsson, V. ♦ Gerhardts, R. R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ ELECTRON GAS ♦ ABSORPTION SPECTRA ♦ PLASMONS ♦ FAR INFRARED RADIATION ♦ SOLID-STATE PLASMA ♦ MAGNETIC FIELDS ♦ OSCILLATOR STRENGTHS ♦ TWO-DIMENSIONAL CALCULATIONS ♦ HARTREE-FOCK METHOD ♦ LANDAU LEVELS
Abstract The far-infrared absorption of a two-dimensional electron gas with a square-lattice modulation in a perpendicular constant magnetic field is calculated self-consistently within the Hartree approximation. For strong modulation and short period we obtain intrasubband and intersubband magnetoplasmon modes reflecting the subbands of the Hofstadter butterfly in two or more Landau bands. The character of the absorption and the correlation of the peaks to the number of flux quanta through each unit cell of the periodic potential depends strongly on the location of the chemical potential with respect to the subbands, or equivalently, on the density of electrons in the system. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-08-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 8


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