Non-equilibrium Green's function study of transport in disordered double-layer graphene systems

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.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2012

Author dc:creator

• Dellabetta, Brian

Contributors dc:contributor

• Gilbert, Matthew J.

• Graphene
• Bose-Einstein Condensation
• non-equilibrium Green's function (NEGF)

Statement dc:rights

• Copyright 2011 Brian Jon Dellabetta

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/29622

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/29622