Superconductor-insulator transition and Bose-Einstein condensate - Bardeen-Cooper-Schrieffer crossover in the Rashba Moat Band

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Title Superconductor-insulator transition and Bose-Einstein condensate - Bardeen-Cooper-Schrieffer crossover in the Rashba Moat Band
Publication Type dissertation
School or College College of Humanities
Department Philosophy
Author Allami, Hassan
Date 2019
Description We study the superconducting transition in a two-dimensional electron gas with strong Rashba spin-orbit coupling. We assume low electron density, such that only the majority spin band participates in the transition. We show that the superconducting transition follows either the Bose-Einstein condensation (BEC), or the Bardeen-Cooper-Schrieffer (BCS) scenarios, depending on the position of the chemical potential with respect to the bottom of the majority band, and the strength of the Coulomb repulsion between electrons. Hence, the BEC-BCS crossover in this system can be driven either by the change in the chemical potential, or the distance to a gate. Following the path integral approach, we also study the behavior of the system at finite temperature and in particular evaluate the effects of fluctuations, which is especially important in our two-dimensional model.
Type Text
Publisher University of Utah
Dissertation Name Doctor of Philosophy
Language eng
Rights Management (c) Hassan Allami
Format application/pdf
Format Medium application/pdf
ARK ark:/87278/s61p41fg
Setname ir_etd
ID 1707822
Reference URL https://collections.lib.utah.edu/ark:/87278/s61p41fg
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