Phonon spectrum in the spin-Peierls phase of CuGeO${}_3$

L. Spitz, A. Razpopov, S. Biswas +10

CuGeO${}_3$ has long been studied as a prototypical example of the spin-Peierls transition in a $S=1/2$ Heisenberg chain. Despite intensive investigation of this quasi-one-dimensio…