Ru NMR probe of spin susceptibility in the superconducting state of Sr2RuO4

K. Ishida; H. Mukuda; Y. Kitaoka; Z. Q. Mao; H. Fukazawa; Y. Maeno

doi:10.1103/PhysRevB.63.060507

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Ru NMR probe of spin susceptibility in the superconducting state of Sr2RuO4

K. Ishida, H. Mukuda, Y. Kitaoka, Z. Q. Mao, H. Fukazawa, Y. Maeno

DOI 10.1103/PhysRevB.63.060507 · Physical Review B

T1

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Abstract

We report 99Ru Knight-shift (99K) measurement on the high-quality Sr2RuO4 with a superconducting transition temperature Tc∼1.5 K. Its spin component, 99Ks due to the core polarization effect caused by Ru−4d spins, is nearly one order of magnitude larger than that of the 17O Knight shift (17Ks). The 4d−spin susceptibility that has been more precisely measured from 99Ks than 17Ks shows no change across Tc at all. The present result reinforces that Sr2RuO4 is the spin-triplet p−wave superconductor in which electrons are bound together in parallel-spin pairs parallel to the RuO2 plane.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.5	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.48	Pressure not reported	unknown