Ultrasonic observation of small Fermi surfaces in La$T$In${}_5$ ($T$ = Co, Rh, Ir)

Ryosuke Kurihara, Yusuke Hirose, Kazuki Matsui +8

We performed high-field ultrasonic measurements on La$T$In${}_5$ ($T$ = Co, Rh, Ir) to reveal the origin of the small Fermi surface that was recently observed in LaRhIn${}_5$ with an o…