Unconventional superconductivity in Sr2RuO4

被引：50

作者：

Luke, GM ^{[1
]}

Fudamoto, Y

Kojima, KM

Larkin, MI

Nachumi, B

Uemura, YJ

Sonier, JE

Maeno, Y

Mao, ZQ

Mori, Y

Agterberg, DF

机构：

[1] McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada

[2] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[3] Columbia Univ, Dept Phys, New York, NY 10027 USA

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

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

[6] Florida State Univ, NHMFL, Tallahassee, FL 32310 USA

来源：

PHYSICA B | 2000年 / 289卷

关键词：

superconductivity; p-wave; Sr2RuO4;

D O I：

10.1016/S0921-4526(00)00414-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have performed ZF-mu SR measurements of Sr2RuO4 and have observed a spontaneous magnetic field below T-c. This observation, combined with other symmetry considerations demonstrates that superconductivity in Sr2RuO4 is of 'p-wave' (odd-parity) type. Our transverse field mu SR measurements in the mixed state with B = 150 G parallel to (c) over cap clearly indicate the presence of a square flux lattice. We have analysed the field distribution in terms of the penetration depth, coherence length and a Fermi surface anisotropy term and found lambda(T = 0) = 1900 Angstrom. lambda(T --> 0) is quite flat, consistent with a superconducting gap with no nodes as expected for the E-u (k(x) +/- ik(y)) state. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：373 / 376

页数：4

共 10 条

[1] Evidence for a square vortex lattice in Sr2RuO4 from muon-spin-rotation measurements [J].

Aegerter, CM ;

Lloyd, SH ;

Ager, C ;

Lee, SL ;

Romer, S ;

Keller, H ;

Forgan, EM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (33) :7445-7451

[2] Vortex lattice structures of Sr2RuO4 [J].

Agterberg, DF .

PHYSICAL REVIEW LETTERS, 1998, 80 (23) :5184-5187

[3] Square vortex lattices for two-component superconducting order parameters [J].

Agterberg, DF .

PHYSICAL REVIEW B, 1998, 58 (21) :14484-14489

[4] 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

[5]

LARKIN MI, 2000, PHYSICA B, V289

[6] Time-reversal symmetry breaking superconductivity in Sr2RuO4 [J].

Luke, GM ;

Fudamoto, Y ;

Kojima, KM ;

Larkin, MI ;

Merrin, J ;

Nachumi, B ;

Uemura, YJ ;

Maeno, Y ;

Mao, ZQ ;

Mori, Y ;

Nakamura, H ;

Sigrist, M .

NATURE, 1998, 394 (6693) :558-561

[7] 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

[8] Observation of a square flux-line lattice in the unconventional superconductor Sr2RuO4 [J].

Riseman, TM ;

Kealey, PG ;

Forgan, EM ;

Mackenzie, AP ;

Galvin, LM ;

Tyler, AW ;

Lee, SL ;

Ager, C ;

Paul, DM ;

Aegerter, CM ;

Cubitt, R ;

Mao, ZQ ;

Akima, T ;

Maeno, Y .

NATURE, 1998, 396 (6708) :242-245

[9] PHENOMENOLOGICAL THEORY OF UNCONVENTIONAL SUPERCONDUCTIVITY [J].

SIGRIST, M ;

UEDA, K .

REVIEWS OF MODERN PHYSICS, 1991, 63 (02) :239-311

[10] Effect of the vortex core on the magnetic field in hard superconductors [J].

Yaouanc, A ;

deReotier, PD ;

Brandt, EH .

PHYSICAL REVIEW B, 1997, 55 (17) :11107-11110

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