Vortex charges in high-temperature superconductors

被引：53

作者：

Chen, Y ^{[1
]}

Wang, ZD

Zhu, JX

Ting, CS

机构：

[1] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA

[2] Univ Houston, Dept Phys, Houston, TX 77204 USA

[3] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[4] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.89.217001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on a model Hamiltonian with competing antiferromagnetic (AF) and d-wave superconductivity interactions, the vortex charge is investigated by solving the Bogoliubov-de Gennes equations. We found that the vortex charge is negative when a sufficient strength of AF order is induced inside the vortex core; otherwise, it is positive. By tuning the on-site Coulomb repulsion U or the doping parameter delta, a transition between the positive and negative vortex charges may occur. The vortex charge at optimal doping has also been studied as a function of magnetic field. Recent NMR and Hall effect experiments may be understood in terms of the present results.

引用

页码：217001 / 217001

页数：4

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