Chiral superconducting phase and chiral spin-density-wave phase in a Hubbard model on the kagome lattice
Year: 2012
Type: article
Abstract: We study the electronic instabilities of the Hubbard model in the 1/6 hole-doped Kagome lattice using the variational cluster approach. The 1/6 hole doping is unique in the sense that the Fermi level is at the van Hove singularity and the Fermi surface has a perfect nesting. In this case, a density wave is usually realized. However, we demonstrate here that the chiral ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}+i{d}_{xy}$ superconducting state is most favorable when a small Hubbard interaction $U$ ($U<3.0t$) is introduced, and a scalar chiral spin order is realized at large $U$ ($U>5.5t$). Between them, a spin-disordered insulating state is proposed.
Source: Physical Review B
Authors: Shun-Li Yu, Jian-Xin Li
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1651753914