Meissner effect in diffusive normal metal / d-wave superconductor junctions
T. Yokoyama, Y. Tanaka, A. Golubov, J. Inoue, Y. Asano
TL;DR
This paper theoretically investigates how midgap Andreev resonant states at the interface of a d-wave superconductor suppress the Meissner effect in a diffusive normal metal/d-wave superconductor junction, using the Usadel equation.
Contribution
It introduces a theoretical framework that incorporates MARS effects into the analysis of the Meissner effect in such junctions, highlighting the suppression caused by these states.
Findings
MARS formation suppresses the susceptibility of the normal metal.
The Usadel equation with generalized boundary conditions effectively models the interface effects.
Midgap states significantly influence magnetic response in superconductor junctions.
Abstract
The Meissner effect in diffusive normal metal / insulator / d-wave superconductor junctions is studied theoretically in the framework of the Usadel equation under the generalized boundary condition. The effect of midgap Andreev resonant states (MARS) formed at the interface of d-wave superconductor is taken into account. It is shown that the formation of MARS suppresses the susceptibility of the diffusive normal metal.
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