Abstract
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 language | English |
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Pages (from-to) | 851-854 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 74 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2005 |
Externally published | Yes |
Keywords
- Hydrate
- Intercalation
- Misfit-layer compound
- Sulfide
- Superconductivity
ASJC Scopus subject areas
- Physics and Astronomy(all)