Reconstruction of condensed magnetoexciton droplet in a trap in strong magnetic fields

TL;DR

This paper theoretically studies the spatial structure of magnetoexciton condensates in a trapped two-layer system under strong magnetic fields, revealing how trap strength influences condensate density distribution.

Contribution

It introduces a mean field model analyzing how confinement potential affects the shape of magnetoexciton condensate densities in a trap.

Findings

Strong confinement leads to edge-peaked condensate density.

Weak confinement results in inner and edge peaks in density.

Very weak confinement produces a broad condensate density peak.

Abstract

We investigate theoretically the Bose-Einstein condensation of trapped magnetoexcitons in a two-layered system with one layer containing electrons and the other layer containing holes. We have studied the spatial variations of the condensate density in the droplet of electrons and holes. We find that the shape of the electron and hole densities may change due to the competition between repulsive electron-electron/hole-hole interaction and confinement potential of the trap. Our mean field calculations show that when the confinement strength is strong enough the condensate density is peaked at the edge of the droplet, and as the confinement strength weakens the condensate density displays one inner peak and another peak at the edge. For much weaker confinement potential the condensate density may display one broad peak.