High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6

Takaki Muramatsu, Nao Takeshita, Chikeko Terakura, Hidenori Takagi, Yoshinori Tokura, Shigeki Yonezawa, Yuji Muraoka, Zenji Hiroi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

High-pressure effects on the superconducting transitions of β-pyrochlore oxide superconductors AOs2O6 (A=Cs, Rb, K) are studied by measuring resistivity under high pressures up to 16 GPa. The superconducting transition temperature Tc first increases with increasing pressure in all the compounds and then exhibits a broad maximum at 7.6 K (6 GPa), 8.2 K (2 GPa) and 10 K (0.6 GPa) for A=Cs, Rb and K, respectively. Finally, the superconductivity is suppressed completely at a critical pressure near 7 and 6 GPa for A=Rb and K and probably above 10 GPa for A=Cs. Characteristic changes in the temperature dependence of resistivity of RbOs2O6 under high pressure. The residual resistivity largely increases with pressure above 4 GPa and, as a result, resistivity indicates small temperature dependence down to 4.2 K at 7 GPa and application of further pressure up to 10 GPa indicates that temperature dependence of resistivity decrease below 100 K. This characteristic behavior in the β-pyrochlore oxides may originate from the nesting of nearly octahedron shape of Fermi surface.

Original languageEnglish
Pages (from-to)882-883
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006
Externally publishedYes

Fingerprint

High pressure effects
pressure effects
Superconductivity
Oxides
superconductivity
electrical resistivity
oxides
temperature dependence
critical pressure
Oxide superconductors
Fermi surface
Fermi surfaces
Temperature
Superconducting transition temperature
transition temperature
pyrochlore

Keywords

  • High pressure
  • Pypyrochlore
  • Superconductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Muramatsu, T., Takeshita, N., Terakura, C., Takagi, H., Tokura, Y., Yonezawa, S., ... Hiroi, Z. (2006). High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6 Physica B: Condensed Matter, 378-380(SPEC. ISS.), 882-883. https://doi.org/10.1016/j.physb.2006.01.323

High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6 . / Muramatsu, Takaki; Takeshita, Nao; Terakura, Chikeko; Takagi, Hidenori; Tokura, Yoshinori; Yonezawa, Shigeki; Muraoka, Yuji; Hiroi, Zenji.

In: Physica B: Condensed Matter, Vol. 378-380, No. SPEC. ISS., 01.05.2006, p. 882-883.

Research output: Contribution to journalArticle

Muramatsu, T, Takeshita, N, Terakura, C, Takagi, H, Tokura, Y, Yonezawa, S, Muraoka, Y & Hiroi, Z 2006, 'High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6 ', Physica B: Condensed Matter, vol. 378-380, no. SPEC. ISS., pp. 882-883. https://doi.org/10.1016/j.physb.2006.01.323
Muramatsu T, Takeshita N, Terakura C, Takagi H, Tokura Y, Yonezawa S et al. High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6 Physica B: Condensed Matter. 2006 May 1;378-380(SPEC. ISS.):882-883. https://doi.org/10.1016/j.physb.2006.01.323
Muramatsu, Takaki ; Takeshita, Nao ; Terakura, Chikeko ; Takagi, Hidenori ; Tokura, Yoshinori ; Yonezawa, Shigeki ; Muraoka, Yuji ; Hiroi, Zenji. / High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6 In: Physica B: Condensed Matter. 2006 ; Vol. 378-380, No. SPEC. ISS. pp. 882-883.
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