We provide experimental and theoretical evidence for the realization of the Peierls-type structurally distorted state in the quasi-one-dimensional superconductor Sc3CoC4 by a phonon-softening mechanism. The transition from the high- to the final low-temperature phase below 80K proceeds via an extended intermediate temperature regime between 80K and 150K characterized by phonon-driven atom displacements. In support of the low-dimensional character of the title compound we find a highly anisotropic correlation-length of these dynamic distortions.
@article{arxiv.2009.03833,
title = {Evidence for a soft-phonon-mode-driven Peierls-type distortion in Sc$_3$CoC$_4$},
author = {Jan Langmann and Christof Haas and Emmanuel Wenger and Dominik Schaniel and Wolfgang Scherer and Georg Eickerling},
journal= {arXiv preprint arXiv:2009.03833},
year = {2020}
}