Strong Increase in Ultrasound Attenuation Below T${}_{\mathrm{c}}$ in Sr${}_2$RuO${}_4$: Possible Evidence for Domains

Sayak Ghosh, Thomas G. Kiely, Arkady Shekhter +5

Recent experiments suggest that the superconducting order parameter of Sr${}_2$RuO${}_4$ has two components. A two-component order parameter has multiple degrees of freedom in the supe…