Possible cluster pairing correlation in the checkerboard Hubbard model: a quantum Monte Carlo study
| Autor: | Yan Zhang, Yongzheng Wu, Guangkun Liu, Shi-Chao Fang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Work (thermodynamics) Hubbard model Condensed matter physics Quantum Monte Carlo Fermi surface 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Correlation Checkerboard Pairing 0103 physical sciences Cluster (physics) Condensed Matter::Strongly Correlated Electrons General Materials Science 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Physics: Condensed Matter. 31:375601 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/1361-648x/ab25cc |
| Popis: | Constrained-path quantum Monte Carlo method is applied to study the pairing correlation in the checkerboard Hubbard model with inhomogeneous nearest-neighbor hopping at a low doping of holes. The inhomogeneous hopping can enhance the pairing correlation among different plaquette clusters. An obvious maximum for the pairing correlation is observed at a certain inhomogeneous hopping. The cluster pairing correlation shows the strongest long-range behavior at the optimal inhomogeneity. The enhancement of cluster pairing correlation might be associated with the transition of the Fermi surface structure. This work indicates that the inhomogeneous hopping could tailor the pairing correlation effectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|