Penetration depth and density of states in unconventional superconductors: The effects of impurities
Abstract
The discovery of superconductivity in the heavy fermion compounds, and the discovery of high temperature superconductors, have stimulated theoretical inquiry into the properties of unconventional superconductivity. The term unconventional refers to order parameters transforming under nonidentity representations of the point group of the crystal. One of the most striking features of unconventional superconductors is their high sensitivity to scattering by nonmagnetic impurities. In this thesis we present theoretical calculations of the effects of nonmagnetic impurities in both unconventional superconductors, and conventional superconductors, with a highly anisotropic order parameter. In particular we focus on two properties: the penetration depth, and the density of states. Our results should be directly relevant in the interpretation of experimental data, and should play a role in determining the structure of order parameter.
Degree
Ph.D.
Advisors
Muzikar, Purdue University.
Subject Area
Condensation
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