Novel excitonic states and photoluminescence in quantum hall systems

Details Novel excitonic states and photoluminescence in quantum hall systems Novel excitonic states and photoluminescence in quantum hall systems

2003-08-20

arxiv.org/abs/cond-mat/0308410v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

XXVI International Workshop on Condensed Matter Theories; Luso, Portugal, September 2-7, 2002; 10 pages, 5 figures

Scientific paper

The formation and possible decay processes of neutral and charged excitonic complexes in electronic integral and fractional quantum Hall systems are discussed. The excitonic complexes are bound states of a small number of the relevant negatively and positively charged quasiparticles (e.g., conduction electrons and valence holes, reversed-spin electrons and spin holes, Laughlin quasielectrons and quasiholes, composite Fermions) that can occur in a 2D electron in the presence of a strong magnetic field. Examples of such bound states are interband neutral and charged excitons, fractionally charged "anyon excitons", spin waves, skyrmions, or "skyrmion excitons". Possible decay processes include radiative recombination, experimentally observed in photoluminescence or spin transitions, important in the context of nuclear spin relaxation.

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