Si. Shevchenko, QUANTIZED VORTICES IN SYSTEMS WITH PAIRING OF SPATIALLY SEPARATED ELECTRONS AND HOLES, Low temperature physics, 23(9), 1997, pp. 741-745
It is predicted that in systems with pairing of spatially separated el
ectrons and holes the planar vortices, in which the electron-hole pair
s rotate in the plane of the structure, can become energy-advantageous
in a nonuniform magnetic field. In this case the vortices should form
an ordered, though translation-noninvariant, structure. (C) 1997 Amer
ican Institute of Physics.