Speaker
Prof.
Andrej Pustogow
(Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria)
Description
The idea that unconventional superconductivity (SC) in Sr2RuO4 is a solid-state analogue to superfluid 3He-A has been recently overturned. Here we use 17O NMR spectroscopy to probe the SC state in Sr2RuO4 in the limit T→0 down to B/Bc2< 0.2. While the NMR Knight shift K includes contributions of both field-induced quasiparticles (QP) and a possible spin polarization of the condensate, the specific heat C/T includes only the QP term. By comparing the field dependences of K and C/T, we establish an upper bound for the condensate response of < 10% of the normal-state susceptibility, which is sufficient to exclude odd-parity candidates [1].
[1] Proc. Natl. Acad. Sci. (2021); arXiv:2007.13730
Primary authors
Prof.
Andrej Pustogow
(Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria)
Aaron Chronister
(Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA)
Naoki Kikugawa
(National Institute for Materials Science, Tsukuba 305-0003, Japan)
Dmitry A. Sokolov
(Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany)
Fabian Jerzembeck
(Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany)
Clifford W. Hicks
(Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany)
Andrew P. Mackenzie
(Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany)
Eric D. Bauer
(Los Alamos National Laboratory, Los Alamos, NM 87545, USA)
Stuart E. Brown
(Department of Physics & Astronomy, University of California, Los Angeles, CA 90095, USA)
