NUMERICAL SIMULATION OF THE HIGH-Tc SUPERCONDUCTORS
- 1 October 1988
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics B
- Vol. 02 (05) , 975-980
- https://doi.org/10.1142/s0217979288000809
Abstract
Monte Carlo simulations based on the Trotter-Suzuki transformation were carried out using 6 × 6 and 12 × 12 lattices and the single-band Hubbard model with intermediate-range repulsive interaction. The absence of the "minus-sign problem" for sufficiently low temperatures and appropriate doping indicates bosonic behavior reminiscent of superconductivity. It was found that holes prefer to pair on next-nearest-neighbor sites while nearest neighbors are suppressed. Additional electron-phonon coupling in the form of the breathing mode not only preserves this symmetry but strengthening of the bosonic background indicates the possibility of superconductivity.Keywords
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