Lattice Parameters of K-(BEDT-TTF)2Cu[N(CN)2]Br

Yousuke Watanabe, Hideki Sato, Takahiko Sasaki, Naoki Toyota

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36 Citations (Scopus)


The temperature dependence of the lattice parameters of the title compound has been determined by low-temperature X-ray diffraction measurements down to 20 K. It is found that the parameter a takes a minimum around 150 K and a maximum at 80-90 K, while other parameters of b and c, and the unit cell volume abc almost monotonically decrease with decreasing temperature. This anomalous change in the in-plane parameter a contrasts that in the interlayer spacing observed in K-(BEDT-TTF)2Cu(NCS)2, but both structural anomalies correlate phenomenologically with the puzzling resistance maximum around 100 K observed to be common to these organic, high-Tc superconductors.

Original languageEnglish
Pages (from-to)3608-3611
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number11
Publication statusPublished - 1991 Oct


  • lattice parameter
  • organic compound
  • superconductor
  • X-ray diffraction


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