SKM 2023 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Ruthenates
TT 37.8: Talk
Wednesday, March 29, 2023, 17:00–17:15, HSZ 201
Non-local electrodynamics and field angle dependence of the superfluid density in Sr2RuO2 — •Javier Landaeta1, Konstantin Semeniuk1, Joost Aretz1, Ismardo Bonalde2, and Elena Hassinger1 — 1Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — 2Centro de Física, Instituto Venezolano de Investigaciones Científicas, Caracas 1020-A, Venezuela
Although being extensively studied for more than 25 years, the nature of the superconducting order parameter (SOP) of the weak type II superconductor Sr2RuO4 is still strongly debated. To get insight into the nodal structure of the SOP, we carried out a comprehensive study of the temperature dependence of the superfluid density ns at various field orientations. By measuring the superconducting lower critical field Hc1(T) in a spherical sample with ac-susceptibility, we obtained the temperature dependence of ns=Hc1(T)/Hc1(0) down to 0.03 Tc. Our results show that follows a low-temperature power law of T2 up to 0.7Tc irrespective of the field angle. The observed behavior is in excellent agreement with what is expected of a type II superconductor with vertical nodes, with a strong influence of non-local electrodynamics. The discussed mechanisms are highly relevant for all weak type II superconductors.