Screening of electromagnetic field fluctuations by s--wave and d--wave superconductors

TL;DR

This paper theoretically examines how s-wave and d-wave superconductors shield electromagnetic field fluctuations, analyzing spin flip lifetimes and temperature effects above niobium and BSCCO surfaces.

Contribution

It provides a comparative theoretical analysis of electromagnetic shielding by s-wave and d-wave superconductors, including temperature dependence and layer thickness effects.

Findings

Shielding effectiveness varies with superconductor type and thickness.

Spin flip lifetime is longer above superconductors, indicating better shielding.

Temperature influences the screening effect differently for s-wave and d-wave superconductors.

Abstract

We investigate theoretically the shielding of the electromagnetic field fluctuations by s-wave and d-wave superconductors within the framework of macroscopic quantum electrodynamics. The spin flip lifetime is evaluated above a niobium and a bismuth strontium calcium copper oxide (BSCCO) surface, and the screening effect is studied as a function of the thickness of the superconducting layer. Further, we study the different temperature dependence of the atomic spin relaxation above the two superconductors.