Excitons in incompressible quantum liquids

Emmanuel I. Rashba

doi:10.1117/12.200938

9 February 1995 Excitons in incompressible quantum liquids

Emmanuel I. Rashba

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200938
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

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.

Citation Download Citation

Emmanuel I. Rashba "Excitons in incompressible quantum liquids", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200938

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