Large entropy change derived from orbitally assisted three-centered two-electron σ bond formation in metallic Li0.33VS2

N. Katayama, S. Tamura, T. Yamaguchi, Koudai Sugimoto, K. Iida, T. Matsukawa, A. Hoshikawa, T. Ishigaki, S. Kobayashi, Y. Ohta, H. Sawa

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Abstract

We discuss herein the emergence of a large entropy change in metallic Li0.33VS2 derived from orbitally assisted loose σ bond formation. Comprehensive structural studies based on synchrotron x-ray and neutron diffraction analyses clarify the fabrication of ribbon chains at 375 K, consisting of multiple three-centered two-electron σ bonds based on the viewpoint of local chemical bonding. Although the metallic conductivity persists down to the lowest temperature measured, an exceptionally large entropy change as a metal, as much as ΔS=6.6Jmol-1K-1, appears at the transition. The emergence of a large entropy change in a metallic state may possibly lead to different functional materials, such as a heat-storage material with a rapid thermal response.

Original languageEnglish
Article number081104
JournalPhysical Review B
Volume98
Issue number8
DOIs
Publication statusPublished - 2018 Aug 7
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Katayama, N., Tamura, S., Yamaguchi, T., Sugimoto, K., Iida, K., Matsukawa, T., Hoshikawa, A., Ishigaki, T., Kobayashi, S., Ohta, Y., & Sawa, H. (2018). Large entropy change derived from orbitally assisted three-centered two-electron σ bond formation in metallic Li0.33VS2. Physical Review B, 98(8), [081104]. https://doi.org/10.1103/PhysRevB.98.081104