Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-06-03
J. Phys.: Condens. Matter 19, 456206 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 8 figures, 4 tables
Scientific paper
10.1088/0953-8984/19/45/456206
The electronic correlations on a C$_{20}$ molecule, as described by an extended Hubbard Hamiltonian with a nearest neighbor Coulomb interaction of strength $V$, are studied using quantum Monte Carlo and exact diagonalization methods. For electron doped C$_{20}$, it is known that pair-binding arising from a purely electronic mechanism is absent within the standard Hubbard model (V=0). Here we show that this is also the case for hole doping for $0
Berlinsky John A.
Kallin Catherine
Lin Fei
Sørensen Erik S.
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