Transverse Sound Revisited: A Directional Probe of the A-Phase of $UP{t}_3$

Brett Ellman, Louis Taillefer, Mario Poirier

We have measured the transverse ultrasonic attenuation, ${\alpha }_{q\epsilon }$, in a well-characterized single crystal of $UP{t}_3$ for propagation direction, $\mathbf{q}$, in the basal plane and pol…