Diffusion Monte Carlo study of excitons and biexcitons in a mass-asymmetric electron-hole bilayer.
作者： Rajesh O. Sharma , L. K. Saini , Bhagwati Prasad Bahuguna
DOI: 10.1039/C7CP02934A
关键词: Phase transition 、 Biexciton 、 Bilayer 、 Condensed matter physics 、 Condensation 、 Radial distribution function 、 Physics 、 Molecular physics 、 Ground state 、 Diffusion Monte Carlo 、 Exciton
摘要: We employed the diffusion Monte Carlo method, under fixed node approximation, to investigate various ground state properties of a mass-asymmetric electron-hole bilayer system. Particularly, we calculated energy, condensation fraction c, and pair correlation function g(r) at density rs = 5 a.u. for inter-planer distance d ≤ 0.5 Based on characteristics condensate faction functions, found phase transition from excitonic fluid biexcitonic 0.24 also analytically critical layer separation dcrit biexciton stability, value which was almost double
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