Transport Between Twisted Graphene Layers

By R. Bistritzer, Allan H. MacDonald. 2010

163 citations recorded by the source corpus.

Commensurate-incommensurate transitions are ubiquitous in physics and are often accompanied by intriguing phenomena. In few-layer graphene FLG systems, commensurability between honeycomb lattices on adjacent layers is regulated by their relative orientation angle , which is in turn dependent on sample preparation procedures. Because incommensurability suppresses interlayer hybridization, it is often claimed that graphene layers can be electrically isolated by a relative twist, even though they are vertically separated by a fraction of a nanometer. We present a theory of interlayer transport in FLG systems which reveals a richer picture in which the specific conductance depends sensitively on , single-layer Bloch-state lifetime, in-plane magnetic field, and bias voltage. We find that linear and differential conductances are generally large and negative near commensurate values of , and small and positive otherwise. We show that accounting for interlayer coupling may be essential for describing transport in FLG despite its physically insignificant effect on the band structure of the system.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a956d00f75d477afefcdc5238ff03f967e2de18e

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

In Materials Chemistry

Citations in the corpus

Electronic properties of graphene-based bilayer systems (2015, background): “MacDonald [444] in the low-energy approximation.”
Novel effects of strains in graphene and other two dimensional materials (2015, background): “[24] Rafi Bistritzer and Allan H MacDonald.”