Spin polarization enhanced by spin-triplet pairing in Sr2RuO4 probed by NMR

K. Ishida, M. Manago, T. Yamanaka, H. Fukazawa, Z. Q. Mao, Y. Maeno, K. Miyake

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We report a phenomenon intimately related to the spin-triplet superconductivity. It is well known that the spin susceptibility decreases below the superconducting transition temperature in almost all superconductors because of spin-singlet pair formation, while it may remain unchanged in a handful of spin-triplet exceptions. Here we report the observation in Sr2RuO4 with nuclear magnetic resonance that the spin susceptibility originating from the Ru-4d electron slightly increases by ∼2% of the total and becomes inhomogeneous in the superconducting state. These are reasonably explained if the electron pairs form the equal-spin pairing in the mixed state. A similar phenomenon was predicted for superfluid He340 years ago, but had never been demonstrated in any superconductor.

Original languageEnglish (US)
Article number100502
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number10
DOIs
StatePublished - Sep 11 2015

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Spin polarization
Superconducting materials
Nuclear magnetic resonance
nuclear magnetic resonance
Electrons
polarization
Superconductivity
Superconducting transition temperature
magnetic permeability
electrons
superconductivity
transition temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ishida, K. ; Manago, M. ; Yamanaka, T. ; Fukazawa, H. ; Mao, Z. Q. ; Maeno, Y. ; Miyake, K. / Spin polarization enhanced by spin-triplet pairing in Sr2RuO4 probed by NMR. In: Physical Review B - Condensed Matter and Materials Physics. 2015 ; Vol. 92, No. 10.
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Spin polarization enhanced by spin-triplet pairing in Sr2RuO4 probed by NMR. / Ishida, K.; Manago, M.; Yamanaka, T.; Fukazawa, H.; Mao, Z. Q.; Maeno, Y.; Miyake, K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 92, No. 10, 100502, 11.09.2015.

Research output: Contribution to journalArticle

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AU - Ishida, K.

AU - Manago, M.

AU - Yamanaka, T.

AU - Fukazawa, H.

AU - Mao, Z. Q.

AU - Maeno, Y.

AU - Miyake, K.

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