Anisotropic superconducting gap in the spin-triplet superconductor Sr2RuO4: Evidence from a Ru-NQR study

K. Ishida, H. Mukuda, Y. Kitaoka, Zhiqiang Mao, Y. Mori, Y. Maeno

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Abstract

We have investigated a gap structure in the spin-triplet superconductor Sr2RuO4 through the measurement of the 101Ru nuclear spin-lattice relaxation rate 101(1/T1) down to 0.09 K at zero magnetic field. In the superconducting state, 1/T1 in a high-quality sample with Tc1.5K exhibits a sharp decrease without the coherence peak, followed by a T3 behavior down to 0.15 K. This result is in marked contrast to the behavior observed below 0.4K in samples with lower Tc, where T1T is a constant. This behavior is demonstrated to be not intrinsic. We conclude that the gap structure in Sr2RuO4 is significantly anisotropic, consistent with line-node-like models.

Original languageEnglish (US)
Pages (from-to)5387-5390
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number23
DOIs
StatePublished - Jan 1 2000

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spin-lattice relaxation
nuclear spin
magnetic fields

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ishida, K. ; Mukuda, H. ; Kitaoka, Y. ; Mao, Zhiqiang ; Mori, Y. ; Maeno, Y. / Anisotropic superconducting gap in the spin-triplet superconductor Sr2RuO4 : Evidence from a Ru-NQR study. In: Physical Review Letters. 2000 ; Vol. 84, No. 23. pp. 5387-5390.
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Anisotropic superconducting gap in the spin-triplet superconductor Sr2RuO4 : Evidence from a Ru-NQR study. / Ishida, K.; Mukuda, H.; Kitaoka, Y.; Mao, Zhiqiang; Mori, Y.; Maeno, Y.

In: Physical Review Letters, Vol. 84, No. 23, 01.01.2000, p. 5387-5390.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Anisotropic superconducting gap in the spin-triplet superconductor Sr2RuO4

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AU - Ishida, K.

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AU - Mori, Y.

AU - Maeno, Y.

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