Josephson vortex motion as a source for dissipation of superflow of e–h pairs in bilayers

• Published in: Journal of physics. Condensed matter Vol. 21; no. 21; pp. 215701 - 215701 (9)
• Main Authors: Fil, D V, Shevchenko, S I
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 27.05.2009; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport in interface structures; Exact sciences and technology; Physics; Quantum hall effect (including fractional); Electrochemical potential; Josephson effect; Dissipation; Tunnel effect; Vortex motion; Electron hole pair; Quantum Hall effect; Bilayers
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/21/21/215701

It is shown that in a bilayer excitonic superconductor dissipative losses emerge under transmission of the current from the source to the load. These losses are proportional to the square of the interlayer tunneling amplitude and are independent of the value of the input current. The case of a quantum Hall bilayer is considered. The bilayer may work as a transmission line if the input current exceeds a certain critical value. An input current higher than the critical one induces Josephson vortices in the bilayer. The difference in electrochemical potentials is required to feed the load and it forces Josephson vortices to move. The state becomes non-stationary which leads to dissipation.