Effect of nonmagnetic impurities on the magnetic resonance peak in YBa2Cu3O7

被引：63

作者：

Fong, HF ^{[1
]}

Bourges, P

Sidis, Y

Regnault, LP

Bossy, J

Ivanov, A

Milius, DL

Aksay, IA

Keimer, B

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] CEA, CNRS, Leon Brillouin Lab, CE Saclay, F-91191 Gif Sur Yvette, France

[3] CEA, Dept Reche Fondamentale Matiere Condensee, F-38054 Grenoble, France

[4] CNRS, CRTBT, F-38042 Grenoble 9, France

[5] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[6] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

[7] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.82.1939

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic excitation spectrum of a YBa2Cu3O7 crystal containing 0.5% of nonmagnetic (Zn) impurities has been determined by inelastic neutron scattering. Whereas in the pure system a sharp resonance peak at E similar or equal to 40 meV is observed exclusively below the superconducting transition temperature T-c, the magnetic response in the Zn-substituted system is broadened significantly and vanishes at a temperature much higher than T-c. The energy-integrated spectral weight observed near q = (pi, pi) increases with Zn substitution, and only about half of the spectral weight is removed at T-c.

引用

页码：1939 / 1942

页数：4

共 38 条

[1] Neutron peak in the extended-saddle-point model of high-temperature superconductors [J].