S. Cohen, T.O. Sedgwick, et al.
MRS Proceedings 1983
We implement a quantum Monte Carlo calculation for a repulsive Hubbard model with nearest- and next-nearest-neighbor hopping interactions on clusters up to 12×12. A parameter region where the Fermi level lies close to the van Hove singularity at the saddle points in the bulk band structure is investigated. A pairing tendency in the (Formula presented) symmetry channel, but no other channel, is found. Estimates of the effective pairing interaction show that it is close to the value required for a 40 K superconductor. Finite-size scaling compares with the attractive Hubbard model. © 1996 The American Physical Society.
S. Cohen, T.O. Sedgwick, et al.
MRS Proceedings 1983
I.K. Pour, D.J. Krajnovich, et al.
SPIE Optical Materials for High Average Power Lasers 1992
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Journal of Physics and Chemistry of Solids
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IEDM 1998