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http://dspace.mediu.edu.my:8181/xmlui/handle/1957/1378| Title: | Heavy fermion effective mass in the superconducting vortex state |
| Authors: | Wasserman, Allen Warren, William W. Jansen, Henri J. Siemens, Philip J. Barnes, Jeffrey |
| Keywords: | heavy fermion superconductor dHvA de Haas-van Alphen correlated electrons extended Lifshitz-Kosevitch quantum magneto-oscillations solid state physics Green's functions |
| Issue Date: | 16-Oct-2013 |
| Description: | Graduation date: 2006 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. |
| URI: | http://koha.mediu.edu.my:8181/xmlui/handle/1957/1378 |
| Other Identifiers: | http://hdl.handle.net/1957/1378 |
| Appears in Collections: | ScholarsArchive@OSU |
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