# Deformation of Fermi Surface Due to Antiferromagnetic Correlation

Source: [Deformation of Fermi Surface Due to Antiferromagnetic Correlation](<https://www.sota2.com/research/paper/68fa24d52c2a3760193a9806>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T09:34:09.845Z

Authors: K. Morita, K. Miyake

Published: 1999-12-16T01:06:53.000Z

## Abstract

It is investigated, on the basis of the fluctuation exchange approximation, how the shape of the Fermi surface is modified in two-dimensional $t-t'-U$ Hubbard model at half filling as strength of the onsite Coulomb interaction $U$ is increased. The antiferromagnetic (AF) correlation length is shown to be enhanced as the Coulomb interaction get closer to the critical value $U\_{\\rm c}$ for the onset AF order. At the same time, the shape of the renormalized Fermi surface is deformed showing the tendency of nesting near $U\_{\\rm c}$.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/9912292>)

[PDF](<https://arxiv.org/pdf/cond-mat/9912292.pdf>)