Superconducting Phase at 7.7 K in the HgxReO3 Compound with a Hexagonal Bronze Structure

Kenya Ohgushi, Ayako Yamamoto, Yoko Kiuchi, Chandreyee Ganguli, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Hidenori Takagi

研究成果: Article

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We have successfully synthesized a new rhenium-based hexagonal bronze material, HgxReO3, which exhibits superconductivity with the transition temperature Tc=7.7K at ambient pressure and 11.1 K at 4 GPa. This compound is a superconductor with the highest Tc among hexagonal bronzes. Moreover, it presents the novel crystallographic feature that (Hg2)2+ polycations, in contrast to monatomic cations in known hexagonal bronzes, are incorporated into open channels. There is evidence that conducting electrons tightly couple with Hg-related phonons. Our results inspire detailed studies on the role of the rattling phonon in the occurrence of superconductivity in the hexagonal bronzes.

元の言語English
記事番号017001
ジャーナルPhysical Review Letters
106
発行部数1
DOI
出版物ステータスPublished - 2011 1 4

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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