Stability limits of flux states in two-band superconductor rings

Leonardo Rodrigues Cadorim; Edson Sardella; Daniel Domínguez; Jorge Berger

doi:10.1103/PhysRevB.110.144513

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Stability limits of flux states in two-band superconductor rings

Leonardo Rodrigues Cadorim, Edson Sardella, Daniel Domínguez, Jorge Berger

DOI 10.1103/PhysRevB.110.144513 · Physical Review B

T1

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Abstract

This study explores transitions between states with different winding number in two-band superconducting rings. From the time-dependent Ginzburg-Landau equations for two-component superconductors, we apply linear instability theory and develop a semianalytical method that provides the critical flux for phase-slip occurrence. The developed method was applied to investigate how the critical flux depends on physical properties, such as band parameters and temperature. Finally, we show the possible existence of a soliton state, in which the phase winding number is different in each condensate.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown