Graphene crystallographically aligned on boron nitride flakes is found to exhibit second generation Dirac points and reversal of Hall effect. Cloning of Dirac points is observed under high magnetic field leading to third generation Dirac points. The results pave way for controlling the electronic structure of graphene in superlattice configurations.
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature12187.html
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature12187.html
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