Abstract
We report the first-principles Wannier function study of the electronic structure of two polymorphs of borophene: 8-Pmmn and 6-P6/mmm (henceforth denoted as 6-Pmmm) borophene, where 8 and 6 depict the number of nonequivalent atoms per unit cell. Both structures are found to be anisotropic metals with electronic structures dominated by weak inter- and intra-hopping physics, suggesting strongly correlated metallic ground states. Our findings could aid in explaining the recently observed strong Coulomb interaction in related materials such as graphene bilayer.
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