Record Details

Title:
Fermi condensation near van Hove singularities within the Hubbard Model on the triangular lattice
Affiliation(s):
XFEL.EU staff, Other
Topic:
Scientific area:
Abstract:
The proximity of the Fermi surface to van Hove singularities drastically enhances interaction effects and leads to essentially new physics. In this work we address the formation of flat bands (“Fermi condensation”) within the Hubbard model on the triangular lattice and provide a detailed analysis from an analytical and numerical perspective. To describe the effect we consider both weak-coupling and strong-coupling approaches, namely the renormalization group and dual fermion methods. It is shown that the band flattening is driven by correlations and is well pronounced even at sufficiently high temperatures, of the order of 0.1–0.2 of the hopping parameter. The effect can therefore be probed in experiments with ultracold fermions in optical lattices.
Imprint:
American Physical Society, 2014
Journal Information:
Physical Review Letters, 112 (7), 070403 (2014)
External related publications:
Language(s):
English


Export


 Record created 2018-07-17, last modified 2018-07-19

Fulltext:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)