Effect of On-site Coulomb Repulsion on Ferromagnetic Fluctuations in Heavily Overdoped Cuprates

被引：3

作者：

Teranishi, Shingo ^{[1
]}

Nishiguchi, Kazutaka ^{[2
]}

Yunoki, Seiji ^{[3
,4
,5
,6
]}

Kusakabe, Koichi ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Toyonaka, Osaka 5608531, Japan

[2] Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5608531, Japan

[3] RIKEN, Computat Condensed Matter Phys Lab, Cluster Pioneering Res CPR, Wako, Saitama 3510198, Japan

[4] RIKEN, Computat Mat Sci Res Team, Ctr Computat Sci R CCS, Kobe, Hyogo 6500047, Japan

[5] RIKEN, Computat Quantum Matter Res Team, Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan

[6] RIKEN, Quantum Computat Sci Res Team, Ctr Quantum Comp RQC, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2021年 / 90卷 / 09期

基金：

日本学术振兴会;

关键词：

CONSERVING APPROXIMATIONS; SPIN FLUCTUATIONS; ELECTRON-SYSTEMS; SUPERCONDUCTIVITY; SEARCH; ORDER;

D O I：

10.7566/JPSJ.90.094707

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically study ferromagnetic (FM) fluctuations in the heavily overdoped region of cuprate superconductors. To explore the origin of FM fluctuations, we evaluate the spin susceptibilities of a single-band Hubbard model within the fluctuation exchange approximation. Model parameters are derived using the Wannierization technique and the constrained random phase approximation method based on the maximally localized Wannier functions. The constrained random phase approximation calculations reveal that the on-site Coulomb interaction decreases with an increase in hole doping. This reduction of the on-site Coulomb interaction leads to the emergence of FM fluctuations in heavily overdoped cuprates.

引用

页数：7

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