Surface impedance theory for superconductors in large static magnetic fields

• Main Author: Sherman, Richard David
• Format: Others
• Published: 1971
• Online Access: https://thesis.library.caltech.edu/9599/1/Sherman_rd_1971.pdf; Sherman, Richard David (1971) Surface impedance theory for superconductors in large static magnetic fields. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/R9YN-V750. https://resolver.caltech.edu/CaltechTHESIS:03022016-130412002 <https://resolver.caltech.edu/CaltechTHESIS:03022016-130412002>

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.