Instability toward Formation of Quasi-One-Dimensional Fermi Surface in Two-Dimensional t-J Model
Superconductivity
2021-04-22 v1 Strongly Correlated Electrons
Abstract
We show within the slave-boson mean field approximation that the two-dimensional t-J model has an intrinsic instability toward forming a quasi-one-dimensional (q-1d) Fermi surface. This q-1d state competes with, and is overcome by, the d-wave pairing state for a realistic parameter choice. However, we find that a small spatial anisotropy in t and J exposes the q-1d instability which has been hidden behind the d-wave pairing state, and brings about the coexistence with the d-wave pairing. We argue that this coexistence can be realized in La_{2-x}Sr_{x}CuO_4 systems
Keywords
Cite
@article{arxiv.2104.10467,
title = {Instability toward Formation of Quasi-One-Dimensional Fermi Surface in Two-Dimensional t-J Model},
author = {Hiroyuki Yamase and Hiroshi Kohno},
journal= {arXiv preprint arXiv:2104.10467},
year = {2021}
}
Comments
15 pages, 10 figures, for those who cannot download JPSJ papers