Correlation effects on spin-polarized electron-hole quantum bilayer

Saini, L. K.; Nayak, Mukesh G.; Sharma, Rajesh O.

doi:10.1063/1.4946051

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Diffusion Monte Carlo study of excitons and biexcitons in a mass-asymmetric electron–hole bilayer

Sharma

Saini

Bahuguna

2017

Phys. Chem. Chem. Phys.

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We employed the diffusion Monte Carlo method, under fixed node approximation, to investigate the various ground state properties of a mass-asymmetric electron-hole bilayer system. Particularly, we calculated the ground state energy, the condensation fraction c, and the pair correlation function g(r) at density r = 5 a.u. for the inter-planer distance d ≤ 0.5 a.u. Based on the characteristics of condensate faction and pair correlation functions, we found the phase transition from the excitonic fluid phase to the biexcitonic fluid phase at d = 0.24 a.u. We also analytically calculated the critical layer separation d for biexciton stability, the value for which was almost double the d = 0.24 a.u.

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