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Modifying electronic structure of graphene with external perturbations

Speaker: 
Marcin Mucha Kruczynski (Bath University)
Date: 
Thu, 31/07/2014 - 11:00am to 12:00pm
Location: 
S13-M01-11 (Physics Conference Room)
Event Type: 
Seminars

Abstract

Because of its atomic thickness and elastic properties, electronic structure of graphene can be significantly modified with external perturbations. In this talk, I will discuss some theoretical models constructed to capture changes in the band and Landau level structure in (mono- and bilayer) graphene due to strain, external electric field and presence of a substrate. In particular, I will talk about strain-induced changes in the topology of the low-energy band structure of bilayer graphene and signatures of pseudo-magnetic field in electronic transport through strained graphene ribbons. I will also discuss formation of minibands in graphene on incommensurate hexagonal substrates (e.g. h-BN) and some peculiarities of the band structure of bilayer graphene in strong perpendicular electric fields.

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