Spin-triplet superconductivity due to antiferromagnetic spin-fluctuation in Sr2RuO4

被引：120

作者：

Kuwabara, T ^{[1
]}

Ogata, M ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Arts & Sci, Dept Basic Sci, Tokyo 1538902, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.85.4586

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A mechanism leading to the spin-triplet superconductivity is proposed based on the antiferromagnetic spin-fluctuation. The effects of anisotropy in spin-fluctuation on the Cooper pairing and on the direction of d vector are examined in the one-band Hubbard model with random-phase approximation. The gap equations for the anisotropic case are derived and applied to Sr2RuO4 It is found that a nesting property of the Fermi surface together with the anisotropy leads to the triplet superconductivity with the d = (z) over cap (sink(x) +/- i sink(y)), which is consistent with experiments.

引用

页码：4586 / 4589

页数：4

共 21 条

[1] Intrinsic superconducting parameters of Sr2RuO4 [J].

Akima, T ;

NishiZaki, S ;

Maeno, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1999, 68 (02) :694-695

[2] THEORIES OF LIQUID HELIUM-3 [J].

EMERY, VJ .

ANNALS OF PHYSICS, 1964, 28 (01) :1-17

[3] 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

[4] 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

[5] 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

[6]

Layzer A., 1971, International Journal of Magnetism, V1, P135

[7]

LAYZER A, 1968, P 11 INT C LOW TEMP, V1, P404

[8] Enhancement of superconductivity of Sr2RuO4 to 3 K by embedded metallic microdomains [J].

Maeno, Y ;

Ando, T ;

Mori, Y ;

Ohmichi, E ;

Ikeda, S ;

NishiZaki, S ;

Nakatsuji, S .

PHYSICAL REVIEW LETTERS, 1998, 81 (17) :3765-3768

[9] SUPERCONDUCTIVITY IN A LAYERED PEROVSKITE WITHOUT COPPER [J].

MAENO, Y ;

HASHIMOTO, H ;

YOSHIDA, K ;

NISHIZAKI, S ;

FUJITA, T ;

BEDNORZ, JG ;

LICHTENBERG, F .

NATURE, 1994, 372 (6506) :532-534

[10] Competitions in layered ruthenates: Ferromagnetism versus antiferromagnetism and triplet versus singlet pairing [J].

Mazin, II ;

Singh, DJ .

PHYSICAL REVIEW LETTERS, 1999, 82 (21) :4324-4327

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