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Evidence for a soft-phonon-mode-driven Peierls-type distortion in Sc 3 CoC 4

Abstract : 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 80 K proceeds via an extended intermediate temperature regime between 80 K and 150 K 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.
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https://hal.univ-lorraine.fr/hal-02960331
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Submitted on : Wednesday, October 7, 2020 - 3:27:37 PM
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Jan Langmann, Christof Haas, Emmanuel Wenger, Dominik Schaniel, Wolfgang Scherer, et al.. Evidence for a soft-phonon-mode-driven Peierls-type distortion in Sc 3 CoC 4. Physical Review B, American Physical Society, 2020, ⟨10.1103/PhysRevB.102.094109⟩. ⟨hal-02960331⟩

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