Phase textures induced by dc current pairbreaking in multilayer structures and two-gap superconductors

Abstract

We predict current-induced formation of equilibrium phase textures for a multicomponent superconducting order parameter. Using the two-component Ginzburg-Landau and Usadel equations, we show that, for weakly coupled co-moving superconducting condensates, dc current I first causes breakdown of the phase locked state at $I>I_{c1}$ followed by the formation of intrinsic phase textures well below the depairing current $I_d$. These phase textures can manifest themselves in multilayer structures, atomic Bose condensate mixtures in optical lattices and two-gap superconductors, particularly MgB${}_2$, where they can result in oscillating and resistive switching effects.

Accepted for publication in PRL

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Cited by in corpus (22)

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• Ground state, collective mode, phase soliton and vortex in multiband superconductors
• Dissociation Transition of a Composite Lattice of Magnetic Vortices in the Flux-Flow Regime of Two-Band Superconductors
• Measurement of the nonlinear Meissner effect in superconducting Nb films using a resonant microwave cavity: A probe of unconventional pairing symmetries
• Stabilizing fractional vortices in multiband superconductors with periodic pinning arrays
• Coherent current states in a two-band superconductor
• Frustration phenomena in Josephson point contacts between single-band and three-band superconductors
• Josephson currents in point contacts between dirty two-band superconductors
• Soliton induced critical current oscillations in two-band superconducting bridges
• Massless and quantized modes of kinks in the phase space of superconducting gaps
• Fluctuations in two-band superconductors in a strong magnetic field
• Fluctuations in superconducting rings with two order parameters
• Tuning vortex fluctuations and the resistive transition in superconducting films with a thin overlayer
• The ground states of the two-component order parameter superconductor
• Roles of intrinsic anisotropy and pi-band pairbreaking effects on critical currents in tilted c-axis MgB2 films probed by magneto-optical and transport measurements
• Fluxon Dynamics of a Long Josephson Junction with Two-gap Superconductors
• Superconductors that do not expel magnetic flux
• DC-driven separation of fractional flux quanta in two-band superconductors
• Josephson effect in point contacts between two-band superconductors
• Unconventional and anomalous magnetic field distribution in a bilayer superconductor with geometric constraints