Phys. Rev. Lett. 90, 047004 (2003) [4 pages]Interband Phase Modes and Nonequilibrium Soliton Structures in Two-Gap SuperconductorsReceived 21 May 2002; published 31 January 2003 We predict a new dynamic state in current-carrying superconductors with a multicomponent order parameter. If the current density J exceeds a critical value Jt, an interband breakdown caused by charge imbalance of nonequilibrium quasiparticles occurs. For J>Jt, the electric field penetrating from current leads gives rise to various static and dynamic soliton phase textures, and voltage oscillations similar to the nonstationary Josephson effect. We propose experiments to observe these effects which would probe the multicomponent nature of the superconducting order parameter. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.047004
DOI:
10.1103/PhysRevLett.90.047004
PACS:
74.20.De, 74.25.Ha, 74.25.–q
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