17O NMR studies of Sr2RuO4 under uniaxial strain

Yongkang Luo; P Guzman; Hsin-Hua Wang; Yue-Shun Su; Adam Dioguardi; Filip Ronning; Naoki Kikugawa; Dmitry Sokolov; Andrew Mackenzie; Eric Bauer; Clifford Hicks; Stuart Brown

¹⁷O NMR studies of Sr₂RuO₄ under uniaxial strain

ORAL

Abstract

Sr₂RuO₄ is a candidate for chiral odd-parity superconductivity with T_c~1.5 K, an interpretation supported by an unchanged ¹⁷O and ¹⁰¹Ru hyperfine shifts upon cooling through T_c. Recently, compressive strain was associated with a sharp peak in T_c, T_c^max~3.5 K, and connected to a Van-Hove Singularity (VHS). Normal state ¹⁷O NMR spectra, recorded at low temperature and in samples subject to compressive strain, exhibit corresponding singularities in hyperfine shifts. The results deviate significantly relative to expectations for the VHS, in that impacted susceptibilities are inferred to originate not just with d_xy orbitals, but also d_yz, d_xz. ¹⁷O NMR measurements in the superconducting state of strained samples are underway.

March 8, 2018, 11:48 AM – March 8, 2018, 12:00 PM

Presenters

Yongkang Luo

Department of Physics and Astronomy, UCLA, Physics and Astronomy, Univ of California - Los Angeles, Los Alamos Natl Lab, Los Alamos National Laboratory

Authors

Yongkang Luo

Department of Physics and Astronomy, UCLA, Physics and Astronomy, Univ of California - Los Angeles, Los Alamos Natl Lab, Los Alamos National Laboratory
P Guzman

Department of Physics and Astronomy, UCLA
Hsin-Hua Wang

Department of Physics and Astronomy, UCLA, Physics and Astronomy, Univ of California - Los Angeles, Department of Physics & Astronomy, Univ of California - Los Angeles
Yue-Shun Su

Department of Physics and Astronomy, UCLA, Physics and Astronomy, University of California, Los Angeles
Adam Dioguardi

Los Alamos National Laboratory, Los Alamos Natl Lab
Filip Ronning

MPA-CMMS, Los Alamos National Laboratory, Los Alamos Natl Lab, Los Alamos National Laboratory, Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory
Naoki Kikugawa

National Institute for Material Science, Max Planck Institute for Chemical Physics of Solids
Dmitry Sokolov

Max Planck Institute for Chemical Physics of Solids
Andrew Mackenzie

Max Planck Institute Chemical Physics of Solids, Max Planck Institute for Chemical Physics of Solids, Max Planck Inst, Max Plank Institute for Chemical Physics of Solids
Eric Bauer

MPA-CMMS, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos Natl Lab, Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Los Alamos National Lab, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory
Clifford Hicks

Max Planck Institute for Chemical Physics of Solids
Stuart Brown

Department of Physics and Astronomy, UCLA, Physics and Astronomy, Univ of California - Los Angeles, Physics and Astronomy, University of California, Los Angeles, Department of Physics & Astronomy, Univ of California - Los Angeles, Physics and Astronomy, UCLA