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Title:Non-equilibrium Green's function study of transport in disordered double-layer graphene systems
Author(s):Dellabetta, Brian
Advisor(s):Gilbert, Matthew J.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Bose-Einstein Condensation
non-equilibrium Green's function (NEGF)
Abstract:The superfluid properties of disordered double-layer graphene systems are investigated using the non-equilibrium Green's function (NEGF) formalism. The complexity of such a structure makes it imperative to study the effects of lattice vacancies which will inevitably arise during fabrication. Room-temperature performance characteristics for both ideal and disordered bilayer graphene systems are compared in an effort to illustrate the behavior of a Bose-Einstein condensate in the presence of lattice defects under non-equilibrium conditions. The study finds that lattice vacancies that spread throughout the top layer past the coherence length have a reduced effect compared to the ideal case. However, vacancies concentrated near the metal contacts within the coherence length significantly alter the interlayer superfluid transport properties.
Issue Date:2012-02-06
Rights Information:Copyright 2011 Brian Jon Dellabetta
Date Available in IDEALS:2012-02-06
Date Deposited:2011-12

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