Weak Coupling Phases of the Attractive $t-t'$ Hubbard Model at the Van Hove Filling

Details Weak Coupling Phases of the Attractive $t-t'$ Hubbard Model at the Van Hove Filling Weak Coupling Phases of the Attractive $t-t'$ Hubbard Model at the Van Hove Filling

1998-03-11

arxiv.org/abs/cond-mat/9803131v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1209/epl/i1998-00520-y

We apply a wilsonian renormalization group approach to the continuum limit of the attractive $t-t'$ Hubbard model, taken when the Fermi level is at the Van Hove singularity of the density of states. The model has well-defined scaling properties and the effective couplings display an unbounded flow in the infrared. We determine the leading instabilities by computing the different response functions up to $t' = 0.5 t$. The phase diagram shows a large boundary between superconducting and charge-density-wave phases, that merge in a triple point with a phase separation instability. The latter is realized down to very low coupling constant, as the Fermi sea degenerates towards a pair of straight lines near $t' = 0.5 t$.

Affiliated with

Also associated with

No associations

Rating

Weak Coupling Phases of the Attractive $t-t'$ Hubbard Model at the Van Hove Filling 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 Weak Coupling Phases of the Attractive $t-t'$ Hubbard Model at the Van Hove Filling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak Coupling Phases of the Attractive $t-t'$ Hubbard Model at the Van Hove Filling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-516167