Inelastic neutron scattering study of magnetic excitations in Sr2RuO4 -: art. no. 064522

被引：106

作者：

Braden, M

Sidis, Y

Bourges, P

Pfeuty, P

Kulda, J

Mao, Z

Maeno, Y

机构：

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

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

[3] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

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

[5] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[6] IIC, Kyoto 6068501, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.66.064522

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic excitations in Sr2RuO4 have been studied by inelastic neutron scattering. The magnetic fluctuations are dominated by incommensurate peaks related to the Fermi surface nesting of the quasi-one-dimensional d(xz) and d(yz) bands. The shape of the incommensurate signal agrees well with random phase approximation calculations. At the incommensurate Q positions the energy spectrum considerably softens upon cooling, pointing to a close magnetic instability: Sr2RuO4 does not exhibit quantum criticality but is very close to it. omega/T scaling may be fitted to the data for temperatures above 30 K. Below the superconducting transition, the magnetic response at the nesting signal is not found to change in the energy range down to 0.4 meV.

引用

页码：645221 / 6452211

页数：11