Ballistic magnon transport and phonon scattering in the antiferromagnet Nd${}_2$CuO${}_4$

S. Y. Li, Louis Taillefer, C. H. Wang +1

The thermal conductivity of the antiferromagnet Nd${}_2$CuO${}_4$ was measured down to 50 mK. Using the spin-flop transition to switch on and off the acoustic Nd magnons, we can reliab…