Direct probe of magnetic field effects on phonons by ultrasound propagation in a quasi-two-dimensional honeycomb magnet Na${}_2$Co${}_2$TeO${}_6$

Xiaochen Hong, Maximilian Schiffer, Beat Valentin Schwarze +9

We study the phonon behavior of a Co-based honeycomb frustrated magnet Na${}_2$Co${}_2$TeO${}_6$ under magnetic field applied perpendicular to the honeycomb plane. The temperature and fi…