Dispersion of magnetic excitations in optimally doped superconducting YBa2Cu3O6.95 -: art. no. 207003

被引：73

作者：

Reznik, D

Bourges, P

Pintschovius, L

Endoh, Y

Sidis, Y

Masui, T

Tajima, S

机构：

[1] Forschungszentrum Karlsruhe, Inst Festkorperforsch, D-76021 Karlsruhe, Germany

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

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Int Inst Adv Studies, Kyoto 6190225, Japan

[5] ISTEC, Superconduct Res Lab, Koutu Ku, Tokyo 1350062, Japan

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.93.207003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Detailed neutron scattering measurements of YBa2Cu3O6.95 found that the resonance peak and incommensurate magnetic scattering induced by superconductivity represent the same physical phenomenon: two dispersive branches that converge near 41 meV and the in-plane wave vector q(AF)=(pi/a,pi/a) to form the resonance peak. One branch has a circular symmetry around q(AF) and quadratic downward dispersion from approximate to41 meV to the spin gap of 33+/-1 meV. The other, of lower intensity, disperses from approximate to41 meV to at least 55 meV. Our results exclude a quartet of vertical incommensurate rods in q-omega space expected from spin waves produced by dynamical charge stripes as an origin of the observed incommensurate scattering in optimally doped YBCO.

引用

页码：207003 / 1

页数：4

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