Anisotropic pairing in superconducting Sr{sub 2}RuO{sub 4}: Ru NMR and NQR studies
- Department of Material Physics, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560 (Japan)
- Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-01 (Japan)
- Department of Physics, Faculty of Science, Hiroshima University, Higashi-Hiroshima 739 (Japan)
Ru NMR and nuclear quadrupole resonance studies are reported on single-crystal Sr{sub 2}RuO{sub 4} (T{sub c}=0.7 K) with the same layered perovskite structure as La{sub 2}CuO{sub 4}. The Pauli spin susceptibility deduced from the Ru Knight shift is found to be largely enhanced by a factor of {approximately}5.4 as compared with the value from the band calculation. In the superconducting state, the nuclear spin-lattice relaxation rate 1/T{sub 1} exhibits a sharp decrease with no coherence peak just below T{sub c} and the T{sub 1}T=constant behavior well below T{sub c}, suggesting that the anisotropic pairing state is realized as in heavy-fermion and high-T{sub c} superconductors. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 549307
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 2; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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