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http://hdl.handle.net/11375/13448
Title: | Explorations of a Pi-Striped, d-Wave Superconductor |
Authors: | Bazak, Jonathan D. |
Advisor: | Kallin, Catherine |
Department: | Physics and Astronomy |
Keywords: | Condensed Matter Theory;Superconductivity;Bogoliubov-de Gennes Theory;Self-Consistent Mean Field Theory;Pi-Striped Superconductor;Pair Density Wave;Condensed Matter Physics;Condensed Matter Physics |
Publication Date: | Oct-2013 |
Abstract: | <p>The pi-striped, <em>d</em>-wave superconducting (SC) state, which is a type of pair density wave wherein the SC order is spatially modulated, has recently been shown to generate the key ingredients for quantum oscillations consistent with experimental observations (Zelli <em>et al.</em>, 2011, 2012). This was accomplished with a phenomenological approach using non-self-consistent Bogoliubov-de Gennes (BdG) theory. The objective of this thesis is to explore two aspects of this approach: the addition of a charge density wave (CDW) order to the previous non-self-consistent calculations, and an attempt at stabilizing the pi-striped state in fully self-consistent BdG theory. It was found that the CDW order had a minimal effect on the Fermi surface characteristics of the pi-striped state, but that a sufficiently strong CDW degrades the Landau levels which are essential for the formation of quantum oscillations. The self-consistent mean-field calculations were unable to stabilize the pi-striped state under a range of modifications to the Hamiltonian. Free energy calculations with the modulated SC order treated as a parameter demonstrate that the pi-striped state is always less energetically favourable than the normal state for the scenarios which were considered. The results of this study constitute a basis for future, more comprehensive studies, using the BdG approach, of the stability of possible pi-striped SC phases.</p> |
URI: | http://hdl.handle.net/11375/13448 |
Identifier: | opendissertations/8269 9361 4616057 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
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fulltext.pdf | 1.14 MB | Adobe PDF | View/Open |
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