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Superfluidity of in...
Superfluidity of indirect excitons and biexcitons in coupled quantum wells and superlattices
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- Lozovik, Yurii E (författare)
- Russian Academy of Science
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- Berman, Oleg L (författare)
- Russian Academy of Science
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- Willander, Magnus (författare)
- Chalmers
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(creator_code:org_t)
- 2002-11-20
- 2002
- Engelska.
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Ingår i: Journal of Physics. - : Iop Publishing Ltd. - 0953-8984 .- 1361-648X. ; 14:47, s. 12457-12475
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The collective properties of indirect excitons in coupled quantum wells (CQWs) are considered. The energy of the ground state of the exciton liquid as a function of the density of electrons a and holes h at different separations D between a and h layers is analysed. The quantum gas-liquid transition as D decreases is studied. The superfluidity appearance temperatures in the system (Kosterlitz-Thouless transition temperatures) have been estimated at different separations D between a and h layers. For the anisotropic two-dimensional e-h system in CQWs the Mott metal-insulator quantum transition is considered. The instability of the ground state of the system of interacting two-dimensional indirect excitons in a slab of superlattice with alternating a and h layers is established. The stable system of indirect quasi-two-dimensional biexcitons, consisting of indirect excitons with opposite directed dipole moments, is considered. The radius and the binding energy of the indirect biexciton are calculated. The collective spectrum of a rare system of two-dimensional indirect biexcitons, interacting as electrical quadrupoles, is studied. The density of the superfluid component n(s) (T) and the Kosterlitz-Thouless phase transition to the superfluid state in this system are analysed.
Nyckelord
- TECHNOLOGY
- TEKNIKVETENSKAP
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