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7. The absorption spectrum around v = 1: evidence for a small size Skyrmion.

Author

Groshaus, J. G., Umansky, V., Shtrikman, H., Levinson, Y., and Bar-Joseph, I.

Subjects
SKYRME model, ABSORPTION spectra, CHIRALITY, NUCLEAR models, SOLITONS, EXCITON theory, MOLECULAR spectroscopy
Abstract

We measure the absorption spectrum of a two-dimensional electron system (2DES) in a GaAs quantum well in the presence of a perpendicular magnetic field. We focus on the absorption spectrum into the lowest Landau Level around v = 1. We find that the spectrum consists of bound electron-hole complexes, trionlike and excitonlike. We show that their oscillator strength is a powerful probe of the 2DES spatial correlations. We find that near v = 1 the 2DES ground state consists of Skyrmions of small size (a few magnetic lengths). © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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