Evidence for vertical line nodes in Sr${}_2$RuO${}_4$ from nonlocal electrodynamics

J. F. Landaeta, K. Semeniuk, J. Aretz +8

By determining the superconducting lower and upper critical fields $H_{c1}(T)$ and $H_{c2}(T)$, respectively, in a high-purity spherical Sr${}_2$RuO${}_4$ sample via ac-s…