Volume 59, Number 6, September II 2002
|Page(s)||875 - 881|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
Electron-hole imbalance in superconductor/normal-metal mesoscopic structures
Theoretische Physik III-Ruhr-Universität
Bochum - D-44780 Bochum,Germany
2 L. D. Landau Institute for Theoretical Physics - 117940 Moscow, Russia
3 Institute of Radioengineering and Electronics of the Russian Academy of Sciences 103907 Moscow, Russia
Accepted: 27 June 2002
We analysed the electron-hole or, in other words, branch imbalance (BI) and the related electric potential Vimb which may arise in a mesoscopic superconductor/normal-metal (S/N) structure under non-equilibrium conditions in the presence of a supercurrent. Non-equilibrium conditions can be created in different ways: a) a quasiparticle current flowing between the N reservoirs; b) a temperature gradient between the N reservoirs and no quasiparticle current. It is shown that the voltage Vimb oscillates with the phase difference φ. In a cross-geometry structure the voltage Vimb arises in the vertical branch and affects the conditions for a transition to the π-state.
PACS: 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects
© EDP Sciences, 2002
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