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Proceedings Paper

Excitons in incompressible quantum liquids
Author(s): Emmanuel I. Rashba
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Paper Abstract

A theory of excitons in semiconductors in the Fractional Quantum Hall (FQH) Effect regime is presented. Non-conventional properties of magnetoexcitons in this regime originate from the fact that elementary excitations of the FQH phases carry fractional charges. Properties of excitons strongly depend on the separation h between electron and hole confinement planes. When this separation is not too small, h <EQ l, where l is the magnetic length, excitons look like quasiatoms consisting of a valence hole and several fractional charges. Charge fractionalization results in a multiple-branch structure of the exciton energy spectrum. Symmetric classification of the branches is proposed, and their relation to the low-energy part of the Hilbert space of the charged elementary excitations of the FQH phases is established. Spectroscopic implications of the spectra classification, including the selection rules, are discussed.

Paper Details

Date Published: 9 February 1995
PDF: 14 pages
Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); doi: 10.1117/12.200938
Show Author Affiliations
Emmanuel I. Rashba, Univ. of Utah and Landau Institute for Theoretical Physics (United States)

Published in SPIE Proceedings Vol. 2362:
International Conference on Excitonic Processes in Condensed Matter
Jai Singh, Editor(s)

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