Sub-THz momentum drag and violation of Matthiessen's rule in an ultraclean ferromagnetic SrRuO${}_3$ metallic thin film

Youcheng Wang, G. Bosse, H. P. Nair +9

SrRuO${}_3$, a ferromagnet with an approximately 160\,K Curie temperature, exhibits a $T^2$ dependent dc resistivity below $\approx$ 30 K. Nevertheless, previous optical studies in t…