Phase solitons and subgap excitations in two-band superconductors

K. V. Samokhin

doi:10.1103/PhysRevB.86.064513

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Phase solitons and subgap excitations in two-band superconductors

K. V. Samokhin

DOI 10.1103/PhysRevB.86.064513 · Physical Review B

T1

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Abstract

A phase soliton is a topological defect peculiar to two-band superconductors, which is associated with a 2π winding of the relative phase of the two superconducting condensates. I study the quasiparticle spectrum in the presence of a single planar phase soliton. I show that the order-parameter phase variation in each of the bands leads to the existence of subgap states bound to the soliton. Calculation of the soliton energy valid at all temperatures is presented with exact analytical results obtained for a simple soliton model.

Source-reported materials — not catalogue approval

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
CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown