Superfluidity and quantum vortices in systems with pairing of spatially separated electrons and holes in crossed magnetic and electric fields

Abstract

The low-temperature behavior of two-dimensional systems with pairing spatially separated electrons and holes is studied. We predict a transition to a superfluid state of a dilute gas of electron-hole pairs in a strong magnetic field normal to conducting layers. In the superfluid phase the crossed electric and magnetic fields are shown to create planar vortices where the pairs rotate in the structure plane.