Reduction of the Spin Susceptibility in the Superconducting State of Sr2RuO4 Observed by Polarized Neutron Scattering

A. N. Petsch, M. Zhu, Mechthild Enderle, Z. Q. Mao, Y. Maeno, I. I. Mazin, S. M. Hayden

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Recent observations [A. Pustogow, Nature (London) 574, 72 (2019).NATUAS0028-083610.1038/s41586-019-1596-2] of a drop of the O17 nuclear magnetic resonance (NMR) Knight shift in the superconducting state of Sr2RuO4 challenged the popular picture of a chiral odd-parity paired state in this compound. Here we use polarized neutron scattering (PNS) to show that there is a 34±6% drop in the magnetic susceptibility at the Ru site below the superconducting transition temperature. We measure at lower fields H∼13Hc2 than a previous PNS study allowing the suppression to be observed. The PNS measurements show a smaller susceptibility suppression than NMR measurements performed at similar field and temperature. Our results rule out the chiral odd-parity d=z^(kx±iky) state and are consistent with several recent proposals for the order parameter including even-parity B1g and odd-parity helical states.

Original languageEnglish (US)
Article number217004
JournalPhysical review letters
Volume125
Issue number21
DOIs
StatePublished - Nov 18 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Reduction of the Spin Susceptibility in the Superconducting State of Sr2RuO4 Observed by Polarized Neutron Scattering'. Together they form a unique fingerprint.

Cite this