Phase transitions of electron-hole and unbalanced electron systems in coupled quantum wells in high magnetic field

TL;DR

This paper investigates phase transitions in coupled quantum wells under high magnetic fields, focusing on superfluidity, excitonic phases, and their dependence on magnetic field and layer separation.

Contribution

It provides a theoretical analysis of superfluid transition temperatures and phase boundaries in electron-hole systems in high magnetic fields, including the equation of state.

Findings

Calculated the Kosterlitz-Thouless transition temperature as a function of magnetic field and separation.

Analyzed the equation of state for magnetoexciton systems in the quasi-classical regime.

Discussed the transition from excitonic to electron-hole phases and potential experimental signatures.

Abstract

Superfluidity of spatially separated electrons and holes and unbalanced two-layer electron system in high magnetic field is considered. The temperature of the Kosterlitz-Thouless transition to a superfluid state is obtained as a function of magnetic field and interlayer separation. The equation of state for magnetoexciton system in quasi-classical regime is analyzed. The transition from excitonic phase to electron-hole phase is considered. Possible experimental manifestations of the predicted effects are briefly discussed.