Excitonic complexes in quantum Hall systems

Details Excitonic complexes in quantum Hall systems Excitonic complexes in quantum Hall systems

2003-08-20

arxiv.org/abs/cond-mat/0308411v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15th Int. Conf. on High Magnetic Fields in Semiconductor Physics; Clarendon Laboratory, Oxford, August 5-9, 2002; 12 pages, 12

Scientific paper

The formation and various 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 occur in an electron system under specific conditions (e.g., electron density, well width, electric and magnetic fields, or hydrostatic pressure). The examples of such bound states are interband neutral and charged excitons, fractionally charged "anyon excitons", spin waves, skyrmions, or "skyrmion excitons". Their possible decay processes include radiative recombination, experimentally observed in photoluminescence or far infrared emission, or spin transitions, important in the context of nuclear spin relaxation.

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