Normal-state spin dynamics in the spin-triplet superconductor Sr2RuO4 -: art. no. 100501

被引：42

作者：

Ishida, K

Mukuda, H

Minami, Y

Kitaoka, Y

Mao, ZQ

Fukazawa, H

Maeno, Y

机构：

[1] Japan Sci & Technol Corp, CREST, Kawaguchi, Saitama 3320012, Japan

[2] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[3] Osaka Univ, Grad Sch Engn, Dept Phys Sci, Osaka 5608531, Japan

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.64.100501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties in the normal state of spin-triplet superconductor Sr2RuO4 are discussed on the basis of Ru- and O-NMR and neutron-diffraction (ND) measurements reported so far. Besides strong incommensurate antiferromagnetic (IC-AFM) fluctuations probed by the ND measurements, it is shown that q-independent fluctuations are present over a wide temperature range up to 500 K from the comparison between NMR and ND results. From an anisotropy in the nuclear spin lattice relaxation rate 1/T-1 at both the Ru and O sites, it was found that the IC-AFM fluctuations are anisotropic so that the out-of-plane component of low-frequency dynamical susceptibility, chi'(IC,out)(q,omega) is by a factor of similar to3 larger than the in-plane one, chi"(IC,in)(q, omega). These unique characters in magnetic fluctuations are implied to have some relevance for the occurrence of spin-triplet superconductivity.

引用

收藏

页数：4

相关论文

共 25 条

[1] Temperature dependence of the penetration depth in Sr2RuO4:: Evidence for nodes in the gap function [J].

Bonalde, I ;

Yanoff, BD ;

Salamon, MB ;

Van Harlingen, DJ ;

Chia, EME ;

Mao, ZQ ;

Maeno, Y .

PHYSICAL REVIEW LETTERS, 2000, 85 (22) :4775-4778

[2] Polarized-neutron scattering study of the Cooper-pair moment in Sr2RuO4 [J].

Duffy, JA ;

Hayden, SM ;

Maeno, Y ;

Mao, Z ;

Kulda, J ;

McIntyre, GJ .

PHYSICAL REVIEW LETTERS, 2000, 85 (25) :5412-5415

[3] Spin-triplet superconductivity with line nodes in Sr2RuO4 [J].

Hasegawa, Y ;

Machida, K ;

Ozaki, M .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2000, 69 (02) :336-339

[4] 17O NMR evidence for orbital dependent ferromagnetic correlations in Sr2RuO4 [J].

Imai, T ;

Hunt, AW ;

Thurber, KR ;

Chou, FC .

PHYSICAL REVIEW LETTERS, 1998, 81 (14) :3006-3009

[5] Anisotropic superconducting gap in the spin-triplet superconductor Sr2RuO4:: Evidence from a Ru-NQR study [J].

Ishida, K ;

Mukuda, H ;

Kitaoka, Y ;

Mao, ZQ ;

Mori, Y ;

Maeno, Y .

PHYSICAL REVIEW LETTERS, 2000, 84 (23) :5387-5390

[6] Anisotropic pairing in superconducting Sr2RuO4: Ru NMR and NQR studies [J].

Ishida, K ;

Kitaoka, Y ;

Asayama, K ;

Ikeda, S ;

Nishizaki, S ;

Maeno, Y ;

Yoshida, K ;

Fujita, T .

PHYSICAL REVIEW B, 1997, 56 (02) :R505-R508

[7] Spin-triplet superconductivity in Sr2RuO4 identified by 17O Knight shift [J].

Ishida, K ;

Mukuda, H ;

Kitaoka, Y ;

Asayama, K ;

Mao, ZQ ;

Mori, Y ;

Maeno, Y .

NATURE, 1998, 396 (6712) :658-660

[8] RuNMR probe of spin susceptibility in the superconducting state of Sr2RuO4 -: art. no. 060507 [J].

Ishida, K ;

Mukuda, H ;

Kitaoka, Y ;

Mao, ZQ ;

Fukazawa, H ;

Maeno, Y .

PHYSICAL REVIEW B, 2001, 63 (06) :605071-605074

[9] Crib-shaped triplet-pairing gap function for an orthogonal pair of quasi-one-dimensional Fermi surfaces in Sr2RuO4 -: art. no. 060506 [J].

Kuroki, K ;

Ogata, M ;

Arita, R ;

Aoki, H .

PHYSICAL REVIEW B, 2001, 63 (06)

[10] Spin-triplet superconductivity due to antiferromagnetic spin-fluctuation in Sr2RuO4 [J].

Kuwabara, T ;

Ogata, M .

PHYSICAL REVIEW LETTERS, 2000, 85 (21) :4586-4589