Spectral properties of the three-dimensional Hubbard model

Details Spectral properties of the three-dimensional Hubbard model Spectral properties of the three-dimensional Hubbard model

2010-12-29

arxiv.org/abs/1012.5950v2

Phys. Rev. B 83, 235113 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages, 14 figures

Scientific paper

10.1103/PhysRevB.83.235113

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 obtain momentum resolved spectral functions for the N'eel 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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