paper

The structure of intercalated water in superconducting Na $_{0.35}$ CoO $_{2} \cdot$ 1.37D $_{2}$ O: Implications for the superconducting phase diagram

arXiv:cond-mat/0403661

Abstract

We have used electron and neutron powder diffraction to elucidate the structural properties of superconducting \NaD. Our measurements show that our superconducting sample exhbits a number of supercells ranging from $1/3 a^{*}$ to $1/15 a^{*}$ , but the most predominant one, observed also in the neutron data, is a double hexagonal cell with dimensions \dhx. Rietveld analysis reveals that \deut\space is inserted between CoO $_{2}$ sheets as to form a layered network of NaO $_{6}$ triangular prisms. Our model removes the need to invoke a 5K superconducting point compound and suggests that a solid solution of Na is possible within a constant amount of water $y$ .

4 pages, 3 figures

The structure of intercalated water in superconducting Na0.35​CoO2​⋅1.37D2​O: Implications for the superconducting phase diagram

Abstract

The structure of intercalated water in superconducting Na $_{0.35}$ CoO $_{2} \cdot$ 1.37D $_{2}$ O: Implications for the superconducting phase diagram