High-energy spin dynamics in La1.69Sr0.31NiO4 -: art. no. 147202

被引：51

作者：

Bourges, P ^{[1
]}

Sidis, Y

Braden, M

Nakajima, K

Tranquada, JM

机构：

[1] Ctr Etud Saclay, CNRS, CEA, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[2] Forschungszentrum Karlsruhe, IFP, D-76021 Karlsruhe, Germany

[3] Univ Tokyo, ISSP, Neutron Scattering Lab, Tokai, Ibaraki, Japan

[4] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.90.147202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

To test the prediction that the dispersion of the magnetic resonance in superconducting YBa2Cu3O6+x is similar to magnons in an incommensurate antiferromagnet, we have mapped out the spin dynamics in a stripe-ordered nickelate, La2-xSrxNiO4, with x similar or equal to 0.31, using inelastic neutron scattering. We observe spin-wave excitations up to 80 meV emerging from the incommensurate magnetic peaks with a surprisingly large and almost isotropic spin velocity: (h) over barc(s)similar to0.32 eV Angstrom. A comparison indicates that the inferred spin-excitation spectrum is not, by itself, an adequate model for the magnetic resonance feature of the superconductor.

引用

页数：4

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