We show that different non-conventional superconductors have one fundamental feature in common: pair eigenstates of the Hamiltonian are repulsion-free, the W=0 pairs. In extended Hubbard models, pairing can occur for reasonable parameter values. For (N,N) nanotubes the binding energy of the pair depends strongly on the filling and decreases towards a reduced but nonzero value for the graphite sheet .
Perfetto, E., Stefanucci, G., Cini, M. (2002). On-site repulsion as the source of pairing in carbon nanotubes and intercalated graphite. THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS, 30(2), 139-142 [10.1140/epjb/e2002-00367-6].
On-site repulsion as the source of pairing in carbon nanotubes and intercalated graphite
Perfetto, E;STEFANUCCI, GIANLUCA;CINI, MICHELE
2002-01-01
Abstract
We show that different non-conventional superconductors have one fundamental feature in common: pair eigenstates of the Hamiltonian are repulsion-free, the W=0 pairs. In extended Hubbard models, pairing can occur for reasonable parameter values. For (N,N) nanotubes the binding energy of the pair depends strongly on the filling and decreases towards a reduced but nonzero value for the graphite sheet .I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
