Biexcitons in two-dimensional systems with spatially separated electrons and holes
arXiv:0808.2067 · doi:10.1103/PhysRevB.78.235307
Abstract
The binding energy and wavefunctions of two-dimensional indirect biexcitons are studied analytically and numerically. It is proven that stable biexcitons exist only when the distance between electron and hole layers is smaller than a certain critical threshold. Numerical results for the biexciton binding energies are obtained using the stochastic variational method and compared with the analytical asymptotics. The threshold interlayer separation and its uncertainty are estimated. The results are compared with those obtained by other techniques, in particular, the diffusion Monte-Carlo method and the Born-Oppenheimer approximation.
11 pages, 7 figures
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- Complexes of dipolar excitons in layered quasi-two-dimensional nanostructures
- Stability of trions in coupled quantum wells modelled by two-dimensional bilayers
- A simple variational method for calculating energy and quantum capacitance of an electron gas with screened interactions
- Attractive and repulsive dipolar interaction in bilayers of indirect excitons
- Resonant Pairing of Excitons in Semiconductor Heterostructures
- Autolocalization in a dipolar exciton system
- Model of fragmentation of the exciton inner ring in semiconductor quantum wells
- Chemical potential and compressibility of quantum Hall bilayer excitons
- Quadriexcitons and excitonic condensate in a symmetric electron-hole bilayer with valley degeneracy
- Optical recombination of biexcitons in semiconductors
- Excitonic Tonks-Girardeau and charge-density wave phases in monolayer semiconductors
- Dipolar polaritons squeezed at unitarity
- Superfluidity of a rarefied gas of electron-hole pairs in a bilayer system
- Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states
- Spin-orbit coupled depairing of a dipolar biexciton superfluid
- Coulomb matrix elements of bilayers of confined charge carriers with arbitrary spatial separation
- Amplification and passing through the barrier of the exciton condensed phase pulse in double quantum wells
- Ground and excited states of coupled exciton liquids in electron-hole quadrilayers
- Direct and indirect exciton mixture in double quantum wells
- Quadriexciton binding energy in electron-hole bilayers