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 language | English |
|---|---|
| Pages (from-to) | 882-883 |
| Number of pages | 2 |
| Journal | Physica B: Condensed Matter |
| Volume | 378-380 |
| Issue number | SPEC. ISS. |
| DOIs | |
| Publication status | Published - May 1 2006 |
| Externally published | Yes |
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Keywords
- High pressure
- Pypyrochlore
- Superconductivity
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Cite this
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 journal › Article
}
TY - JOUR
T1 - High-pressure effects on the superconductivity of β-pyrochlore oxides AOs2O6
AU - Muramatsu, Takaki
AU - Takeshita, Nao
AU - Terakura, Chikeko
AU - Takagi, Hidenori
AU - Tokura, Yoshinori
AU - Yonezawa, Shigeki
AU - Muraoka, Yuji
AU - Hiroi, Zenji
PY - 2006/5/1
Y1 - 2006/5/1
N2 - 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.
AB - 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.
KW - High pressure
KW - Pypyrochlore
KW - Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=33646414180&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646414180&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2006.01.323
DO - 10.1016/j.physb.2006.01.323
M3 - Article
AN - SCOPUS:33646414180
VL - 378-380
SP - 882
EP - 883
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - SPEC. ISS.
ER -