DMRG simulations of the Hubbard model on fullerenes find a lower Mott transition in C20 than prior estimates, repulsive pair binding, and Hund's rule breaking in C40 and C60 consistent with an electronic superconductivity mechanism.
Kaxiras,Atomic and electronic structure of solids, Cambridge University Press, ISBN 0521523397 (2003)
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Pair binding and Hund's rule breaking in high-symmetry fullerenes
DMRG simulations of the Hubbard model on fullerenes find a lower Mott transition in C20 than prior estimates, repulsive pair binding, and Hund's rule breaking in C40 and C60 consistent with an electronic superconductivity mechanism.