Local density of states around a magnetic impurity in high-Tc superconductors based on the t-J model

Details Local density of states around a magnetic impurity in high-Tc superconductors based on the t-J model Local density of states around a magnetic impurity in high-Tc superconductors based on the t-J model

1999-11-09

arxiv.org/abs/cond-mat/9911117v3

Phys. Rev. Lett. 84, 3165 (2000)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.84.3165

The local density of states (LDOS) around a magnetic impurity in high-Tc superconductors is studied using the two-dimensional t-J model with a realistic band structure. The order parameters are determined in a self-consistent way within the Gutzwiller approximation and the Bogoliubov-de Gennes theory. In sharp contrast with the nonmagnetic impurity case, the LDOS near the magnetic impurity shows two resonance peaks reflecting the presence of spin-dependent resonance states. It is also shown that these resonance states are approximately localized around the impurity. The present results have an large implication on the scanning tunneling spectroscopy observation of Bi_{2}Sr_{2}Ca(Cu_{1-x}Ni[Zn]_{x})_{2}O_{8+delta}.

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