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

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Article number017001
JournalPhysical Review Letters
Volume106
Issue number1
DOIs
Publication statusPublished - 2011 Jan 4
Externally publishedYes

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bronzes
superconductivity
rhenium
phonons
transition temperature
occurrences
cations
conduction
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Superconducting Phase at 7.7 K in the HgxReO3 Compound with a Hexagonal Bronze Structure. / Ohgushi, Kenya; Yamamoto, Ayako; Kiuchi, Yoko; Ganguli, Chandreyee; Matsubayashi, Kazuyuki; Uwatoko, Yoshiya; Takagi, Hidenori.

In: Physical Review Letters, Vol. 106, No. 1, 017001, 04.01.2011.

Research output: Contribution to journalArticle

Ohgushi, Kenya ; Yamamoto, Ayako ; Kiuchi, Yoko ; Ganguli, Chandreyee ; Matsubayashi, Kazuyuki ; Uwatoko, Yoshiya ; Takagi, Hidenori. / Superconducting Phase at 7.7 K in the HgxReO3 Compound with a Hexagonal Bronze Structure. In: Physical Review Letters. 2011 ; Vol. 106, No. 1.
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