Record Details
Heavy fermion effective mass in the superconducting vortex state
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Heavy fermion effective mass in the superconducting vortex state |
| Names |
Townsend, Emily A.
(creator) Wasserman, Allen (advisor) |
| Date Issued | 2006-03-21T18:03:30Z (iso8601) |
| Internet Media Type | application/pdf |
| Note | Graduation date: 2006 |
| Abstract | The extended-Lifshitz-Kosevitch formalism (ELK) unifies the treatment of the de Haas-van Alphen (dHvA) effect, allowing it to transcend its traditional roles of mapping Fermi surfaces and measuring effective masses. Here we exploit the capabilities of dHvA as a probe of many-body effects to examine heavy-fermion su- perconductivity. ELK successfully describes dHvA in heavy fermion materials using a slave-boson model in mean field, and in type-II superconducing materials with the introduction of a self energy due to interactions with the vortex lattice. We propose a model for combining these two many-body effects, and examine its implications for dHvA measurements. The result retains the two important characteristics of its parent models: an enhanced effective mass and temperature-independent damping of the oscillations in the superconducting state. However no suppression of the heavy mass is predicted in the superconducting state, contrary to experiment. |
| Genre | Thesis |
| Topic | heavy fermion |
| Identifier | http://hdl.handle.net/1957/1378 |
