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Electric-dipole-induced universality for Dirac fermions in graphene

De Martino, A., Klöpfer, D., Matrasulov, D. & Egger, R. (2014). Electric-dipole-induced universality for Dirac fermions in graphene. Physical Review Letters (PRL), 112(18), article number 186603. doi: 10.1103/physrevlett.112.186603


We study electric dipole effects for massive Dirac fermions in graphene and related materials. The dipole potential accommodates towers of infinitely many bound states exhibiting a universal Efimov-like scaling hierarchy. The dipole moment determines the number of towers, but there is always at least one tower. The corresponding eigenstates show a characteristic angular asymmetry, observable in tunnel spectroscopy. However, charge transport properties inferred from scattering states are highly isotropic.

Publication Type: Article
Additional Information: Copyright APS 2014, published in Physical Review Letters.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments: School of Science & Technology > Mathematics
SWORD Depositor:
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