Excitations from a Bose-Einstein condensate of magnons in coupled spin ladders

V. O. Garlea, A. Zheludev, T. Masuda +9

The weakly coupled quasi-one-dimensional spin ladder compound (CH${}_3$)${}_2$CHNH${}_3$CuCl${}_3$ is studied by neutron scattering in magnetic fields exceeding the critical field of Bose-…