Tuesday, September 11, 2012

1209.1712 (Michael Sarrazin et al.)

Possible new phenomenology in turbostratic graphene bilayer as a
solid-state realization of a two-brane world model
   [PDF]

Michael Sarrazin, Fabrice Petit
It is suggested that two turbostratic graphene layers can be described through a formalism previously introduced for the study of braneworlds in high energy physics. It is demonstrated that any graphene bilayer can be conveniently described as a noncommutative two-sheeted (2+1) spacetime. The model Hamiltonian contains a coupling term connecting the two layers which is a reminiscent of the coupling which may exist between two braneworlds at a quantum level. In the present case, this term is related to a K-K' intervalley coupling. Phenomenological consequences are emphasized such as exciton swapping between the two graphene sheets. An experimental device is suggested to study this possible new effect. If demonstrated, this effet could lead to new technological applications. Incidentally, this demonstration could be also an indirect way to test the braneworld hypothesis.
View original: http://arxiv.org/abs/1209.1712

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