Spatially inhomogeneous phase in the two-dimensional repulsive Hubbard model
| dc.creator | Chang, Chia-Chen | |
| dc.creator | Zhang, Shiwei | |
| dc.date | 2008-05-30 | |
| dc.date | 2008-10-10 | |
| dc.date.accessioned | 2026-07-07T10:19:19Z | |
| dc.date.available | 2026-07-07T10:19:19Z | |
| dc.description | Using recent advances in auxiliary-field quantum Monte Carlo techniques and the phaseless approximation to control the sign/phase problem, we determine the equation of state in the ground state of the two-dimensional repulsive single-band Hubbard model at intermediate interactions. Shell effects are eliminated and finite-size effects are greatly reduced by boundary condition integration. Spin-spin correlation functions and structure factors are also calculated. In lattice sizes up to $16\times 16$, the results show signal for phase-separation. Upon doping, the system separates into one phase of density $n=1$ (hole-free) and the other at density $n_c$ ($\sim 0.9$). The long-range antiferromagnetic order is coupled to this process, and is lost below $n_c$. | |
| dc.description | 5 pages, 5 figures. title changed, final version accepted for publication | |
| dc.identifier | https://arxiv.org/abs/0805.4831 | |
| dc.identifier | http://arxiv.org/abs/0805.4831 | |
| dc.identifier | Phys. Rev. B 78, 165101 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.165101 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174467 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Spatially inhomogeneous phase in the two-dimensional repulsive Hubbard model | |
| dc.type | text |