Low Temperature Physics: 37, 583 (2011); https://doi.org/10.1063/1.3638141 (6 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 7 (July 2011), p. 736-743    ( to contents , go back )

Superfluidity of electron-hole pairs in randomly inhomogeneous bilayer systems

A.I. Bezuglyj

National Science Center "Kharkov Institute of Physics and Technology" 1 Academicheskaya St., Kharkov 61108, Ukraine

S.I. Shevchenko

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: shevchenko@ilt.kharkov.ua
pos Анотація:

Received November 20, 2010

Abstract

Electron-hole (e–h) pairs with spatially separated components in bilayer systems make a transition to a superfluid state with decreasing temperature. The article deals with the influence of random inhomogeneities on the superfluid properties of bilayer systems. It is shown that the ionized impurities and the curvature of the conducting layers decrease the superfluid current density of the e–h-pairs. If the interlayer distance is less than or of the order of magnetic length, the fluctuations of the interlayer distance considerably reduce the superfluid transition temperature.

PACS: 73.21.–b Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems;
PACS: 71.35.Ji Excitons in magnetic fields; magnetoexcitons;
PACS: 73.43.–f Quantum Hall effects.

Key words: bilayer systems, electron-hole pairs, superfluidity, inhomogeneities.

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