Finite-temperature phase transitions in the SU(N) Hubbard model | |
Article | |
关键词: BOSE-EINSTEIN CONDENSATION; METAL-INSULATOR-TRANSITION; ULTRACOLD QUANTUM GASES; MEAN-FIELD THEORY; INFINITE DIMENSIONS; OPTICAL LATTICE; MOLECULES; FERMIONS; SYSTEMS; ATOMS; | |
DOI : 10.1103/PhysRevB.94.041110 | |
来源: SCIE |
【 摘 要 】
We investigate the SU(N) Hubbard model for the multicomponent fermionic optical lattice system, combining dynamical mean-field theory with the continuous-time quantum Monte Carlo method. We obtain the finite-temperature phase diagrams with N <= 6 and find that low-temperature properties depend on the parity of the components. The magnetically ordered state competes with the correlated metallic state in the system with an even number of components (N >= 4), yielding the first-order phase transition. It is also clarified that in the odd-component system, the ordered state is realized at relatively lower temperatures and the critical temperature is constant in the strong coupling limit.
【 授权许可】
Free