Enhanced superconducting transition temperature in the water-intercalated sulfides

Naoyuki Katayama, Minoru Nohara, Fumiko Sakai, Hidenori Takagi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Water-intercalated misfit-layer sulfides Na x(H 2O) y(MS) 1+δ(TaS 2) 2 were found to exhibit superconductivity for M = Sn, Pb, and Sb, as well as anhydrate sulfides (MS) 1+δ(TaS 2) 2 with M = Pb, Sb, and Bi. The optimal transition temperature T c was ≃3 K for the anhydrate sulfides, and was enhanced up to ≃4 K by intercalating a "bilayer" of water between the adjacent TaS 2 layers. This indicates that the presence of water molecule is favorable to superconductivity in the sulfides as in the cobalt oxide Na xCoO 2· nH 2O, for which superconductivity appears only for the "bilayer" hydrate.

Original languageEnglish
Pages (from-to)851-854
Number of pages4
Journaljournal of the physical society of japan
Issue number3
Publication statusPublished - Mar 2005
Externally publishedYes


  • Hydrate
  • Intercalation
  • Misfit-layer compound
  • Sulfide
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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