We discuss herein the emergence of a large entropy change in metallic Li0.33VS2 derived from the orbitally assisted loose {\sigma} 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 {\sigma} bonds based on the viewpoint of local chemical bonding. Although the metallic conductivity persists down to the lowest temperature measured, exceptionally large entropy change as a metal, as much as {\Delta}S = 6.6 J/mol K, appears at the transition. Emergence of a large entropy change in a metallic state expects us the possible novel functional materials, such as a heat-storage material with rapid thermal response.
@article{arxiv.1808.01794,
title = {Large entropy change derived from the orbitally assisted three-centered two-electron {\sigma} bond formation in a metallic Li0.33VS2},
author = {N. Katayama and S. Tamura and T. Yamaguchi and K. Sugimoto and K. Iida and T. Matsukawa and A. Hoshikawa and T. Ishigaki and S. Kobayashi and Y. Ohta and H. Sawa},
journal= {arXiv preprint arXiv:1808.01794},
year = {2018}
}
Comments
6 pages, 4 figures, to be published in Phys. Rev. B: Rapid Communications