Temperature dependence of Peierls-Hubbard phase transition in [Pd(cptn)2Br]Br2 studied by scanning tunneling microscopy

Yuka Hosomi, Shoji Yoshida, Atsushi Taninaka, Takefumi Yoshida, Shinya Takaishi, Osamu Takeuchi, Masahiro Yamashita, Hidemi Shigekawa

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2 Citations (Scopus)

Abstract

The temperature dependence of the Peierls-Hubbard phase transition in [Pd(cptn)2Br]Br2 (cptn: 1R,2R-diaminocyclopentane) was directly observed using a low- Temperature scanning tunneling microscope. A short ligand without alkyl chains was used to form a rigid crystal lattice to reduce the effect of structural changes in the crystal with temperature. The hysteresis in the temperature dependence of the ratio between the areas of the charge density wave (CDW) state produced by the PdII-PdIV mixed-valence state and the Mott-Hubbard (MH) state with a PdIIIaveraged valence state which is a characteristic of the first-order phase transition, was directly observed at the atomic scale. Pinning of the CDW phase by defects was observed below the critical temperature, suggesting the growth of the CDW phase with defects as nuclei.

Original languageEnglish
Article number08NB16
JournalJapanese journal of applied physics
Volume55
Issue number8
DOIs
Publication statusPublished - 2016 Aug

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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