Surface Impedance Theory of Superconductors in Large Static Magnetic Fields

Author: Sherman, Richard David

Year: 1971

Degree: Dissertation (Ph.D.)

Advisor: Feynman, Richard Phillips

Committee Member: Unknown, Unknown

Option: Physics

DOI: 10.7907/R9YN-V750

Abstract

A theory of electromagnetic absorption is presented to explain the changes in surface impedance for Pippard superconductors (ξ_o ≫λ) due to large static magnetic fields. The static magnetic field penetrating the metal near the surface induces a momentum dependent potential in Bogolubov's equations. Such a potential modifies a quasiparticle's wavefunction and excitation spectrum. These changes affect the behavior of the surface impedance in a way that in large measure agrees with available observations.

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