Non-equilibrium Green's function study of transport in disordered double-layer graphene systems
Dellabetta, Brian
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https://hdl.handle.net/2142/29622
Description
Title
Non-equilibrium Green's function study of transport in disordered double-layer graphene systems
Author(s)
Dellabetta, Brian
Issue Date
2012-02-06T20:07:24Z
Director of Research (if dissertation) or Advisor (if thesis)
Gilbert, Matthew J.
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Graphene
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.
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