Tunneling states in graphene heterostructures consisting of two different graphene superlattices

Details Tunneling states in graphene heterostructures consisting of two different graphene superlattices Tunneling states in graphene heterostructures consisting of two different graphene superlattices

2011-02-24

arxiv.org/abs/1102.4963v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 5 figures

Scientific paper

We have theoretically investigated the properties of electronic transport in graphene heterostructures, which are consisted of two different graphene superlattices with one-dimensional periodic potentials. It is found that such heterostructures possess an unusual tunneling state occurring inside the original forbidden gaps, and the electronic conductance is greatly enhanced and Fano factor is strongly suppressed near the energy of the tunneling state. Finally we present the matching condition of the impedance of the pseudospin wave for occuring the tunneling state by using the Bloch-wave expansion method.

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