Lattice susceptibility for 2D Hubbard Model within dual fermion method

Details Lattice susceptibility for 2D Hubbard Model within dual fermion method Lattice susceptibility for 2D Hubbard Model within dual fermion method

2008-04-18

arxiv.org/abs/0804.3043v1

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 11 figures

Scientific paper

In this paper, we present details of the dual fermion (DF) method to study the non-local correction to single site DMFT. The DMFT two-particle Green's function is calculated using continuous time quantum monte carlo (CT-QMC) method. The momentum dependence of the vertex function is analyzed and its renormalization based on the Bethe-Salpeter equation is performed in particle-hole channel. We found a magnetic instability in both the dual and the lattice fermions. The lattice fermion susceptibility is calculated at finite temperature in this method and also in another recently proposed method, namely dynamical vertex approximation (D$\Gamma$A). The comparison between these two methods are presented in both weak and strong coupling region. Compared to the susceptibility from quantum monte carlo (QMC) simulation, both of them gave satisfied results.

Affiliated with

Also associated with

No associations

Rating

Lattice susceptibility for 2D Hubbard Model within dual fermion method does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lattice susceptibility for 2D Hubbard Model within dual fermion method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lattice susceptibility for 2D Hubbard Model within dual fermion method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-304379