The Effect of Disorder in Superfluid Double Layer Graphene

Details The Effect of Disorder in Superfluid Double Layer Graphene The Effect of Disorder in Superfluid Double Layer Graphene

2011-04-12

arxiv.org/abs/1104.2343v1

Journal of Physics: Condensed Matter 23 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 14 figures

Scientific paper

10.1088/0953-8984/23/34/345302

We investigate the superfluid properties of disordered double layer graphene systems 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. We present and compare room temperature performance characteristics for both ideal and disordered bilayer graphene systems in an effort to illustrate the behavior of a Bose-Einstein Condensate in the presence of lattice defects under non-equilibrium conditions. We find that lattice vacancies 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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