Zinc impurities in d-wave superconductors

Th A. Maier; M. Jarrell

doi:10.1103/PhysRevLett.89.077001

Zinc impurities in d-wave superconductors

Th A. Maier, M. Jarrell

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The two-dimensional (2D) Hubbard model with binary diagonal disorder was used to study the effects of nonmagnetic (Zn) impurities on high-temperature superconductivity. Zn impurities strongly suppressed superconductivity. As evidenced by the increasing mean-field character of the pair-field and antiferromagnetic susceptibilities with Zn substitution, spin fluctuations beyond mean field that mediate pairing get suppressed. Consistent with experiments, T_c decreased linearly with impurity concentration. With increasing Zn content, a change of the magnetic susceptibility to Curie-Weiss-like behavior originating in the existence of free magnetic moments was found.

Original language	English
Article number	077001
Pages (from-to)	077001/1-077001/4
Journal	Physical Review Letters
Volume	89
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.89.077001
State	Published - Aug 12 2002
Externally published	Yes

Funding

We acknowledge useful conversations with W. Putikka, D. J. Scalapino, Y. Wang, and M. Vojta. This work was supported by NSF Grant No. DMR-0073308. This research was supported in part by NSF Cooperative Agreement No. ACI-9619020 through computing resources provided by the National Partnership for Advanced Computational Infrastructure at the Pittsburgh Supercomputer Center.

Funders	Funder number
National Science Foundation

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10.1103/PhysRevLett.89.077001

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Zinc impurities in d-wave superconductors

Abstract

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