期刊
PHYSICAL REVIEW B
卷 83, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.235113
关键词
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资金
- Deutsche Forschungsgemeinschaft through the collaborative research center [SFB 602]
- German Academic Exchange Service (DAAD)
- National Science Foundation [OISE-0952300, DMR-0706379, DMR-0705847, DMR-1006282]
- Office Of The Director
- Office Of Internatl Science &Engineering [952300] Funding Source: National Science Foundation
We present momentum-resolved single-particle spectra for the three-dimensional Hubbard model for the paramagnetic and antiferromagnetically ordered phase obtained within the dynamical cluster approximation. The effective cluster problem is solved by continuous-time quantum Monte Carlo simulations. The absence of a time discretization error and the ability to perform Monte Carlo measurements directly in Matsubara frequencies enable us to analytically continue the self-energies by maximum entropy, which is essential to obtaining momentum-resolved spectral functions for the Neel state. We investigate the dependence on temperature and interaction strength and the effect of magnetic frustration introduced by a next-nearest-neighbor hopping. One particular question we address here is the influence of the frustrating interaction on the metal-insulator transition of the three-dimensional Hubbard model.
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