Quantum Monte Carlo Evidence for d-wave Pairing in the 2D Hubbard Model at a van Hove Singularity
We implement a Quantum Monte Carlo calculation for a repulsive Hubbard model with nearest and next-nearest neighbor hopping interactions on clusters up to 12x12. A parameter region where the Fermi level lies close to the van Hove singularity at the Saddle Points in the bulk band structure is investi...
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| Veröffentlicht in: | arXiv.org 1996-08 |
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| creator | Husslein, T Morgenstern, I Newns, D M Pattnaik, P C Singer, J M Matuttis, H G |
| description | We implement a Quantum Monte Carlo calculation for a repulsive Hubbard model with nearest and next-nearest neighbor hopping interactions on clusters up to 12x12. 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 \(d_{x^2-y^2}\) 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. |
| doi_str_mv | 10.48550/arxiv.9608030 |
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| subjects | Computer simulation Monte Carlo simulation Saddle points Two dimensional models |
| title | Quantum Monte Carlo Evidence for d-wave Pairing in the 2D Hubbard Model at a van Hove Singularity |
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