Ultrasonic Observation of Slowing Down of Multipole Fluctuations in Sr${}_2$RuO${}_4$

Ryosuke Kurihara, Mitsuhiro Akatsu, Shunsuke Yaoita +5

We performed ultrasonic measurements on the unconventional superconductor Sr${}_2$RuO${}_4$ to investigate the dynamical properties of the electronic states near its superconducting tr…