Dipolar Excitons, Spontaneous Phase Coherence, and Superfluid-Insulator Transition in Bilayer Quantum Hall Systems at {nu} =1
Journal Article
·
· Physical Review Letters
The spontaneous interlayer phase coherent (111) state of a bilayer quantum Hall system at filling factor {nu}=1 may be viewed as a condensate of interlayer particle-hole pairs or excitons. We show that when the layers are biased in such a way that these excitons are very dilute, they may be viewed as pointlike bosons. We calculate the exciton dispersion relation and show that the exciton-exciton interaction is dominated by the dipole moment they carry. In addition to the phase coherent state, we also find a Wigner crystal/glass phase in the presence/absence of disorder which is an insulating state for the excitons. The position of the phase boundary is estimated and the transition between these two phases is discussed.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40277294
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 87; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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