Superconducting to spin-glass state transformation in β-pyrochlore KxOs2O6

C. C. Lee; W. L. Lee; Jiunn-Yuan Lin; C. C. Tsuei; J. G. Lin; F. C. Chou

doi:10.1103/PhysRevB.83.104503

Superconducting to spin-glass state transformation in β-pyrochlore K_xOs₂O₆

C. C. Lee^*, W. L. Lee, Jiunn-Yuan Lin, C. C. Tsuei, J. G. Lin, F. C. Chou

^*Corresponding author for this work

Institute of Physics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

β-pyrochore KOs₂O₆, which shows superconductivity below ∼9.7 K, has been converted into K_xOs ₂O₆ (x 23-12) electrochemically to show spin-glass-like behavior below ∼6.1 K. A room-temperature sample surface potential versus charge transfer scan indicates that there are at least two two-phase regions for x between 1 and 0.5. A rattling model of superconductivity for the title compound has been examined using electrochemical potassium de-intercalation. The significant reduction of superconducting volume fraction due to minor potassium reduction suggests the importance of defect and phase coherence in the rattling model. Magnetic susceptibility, resistivity, and specific heat measurement results have been compared between the superconducting and spin-glass-like samples.

Original language	English
Article number	104503
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.83.104503
State	Published - 14 Mar 2011

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title = "Superconducting to spin-glass state transformation in β-pyrochlore KxOs2O6",

abstract = "β-pyrochore KOs2O6, which shows superconductivity below ∼9.7 K, has been converted into KxOs 2O6 (x 23-12) electrochemically to show spin-glass-like behavior below ∼6.1 K. A room-temperature sample surface potential versus charge transfer scan indicates that there are at least two two-phase regions for x between 1 and 0.5. A rattling model of superconductivity for the title compound has been examined using electrochemical potassium de-intercalation. The significant reduction of superconducting volume fraction due to minor potassium reduction suggests the importance of defect and phase coherence in the rattling model. Magnetic susceptibility, resistivity, and specific heat measurement results have been compared between the superconducting and spin-glass-like samples.",

author = "Lee, {C. C.} and Lee, {W. L.} and Jiunn-Yuan Lin and Tsuei, {C. C.} and Lin, {J. G.} and Chou, {F. C.}",

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AU - Lee, C. C.

AU - Lee, W. L.

AU - Lin, Jiunn-Yuan

AU - Tsuei, C. C.

AU - Lin, J. G.

AU - Chou, F. C.

PY - 2011/3/14

Y1 - 2011/3/14

N2 - β-pyrochore KOs2O6, which shows superconductivity below ∼9.7 K, has been converted into KxOs 2O6 (x 23-12) electrochemically to show spin-glass-like behavior below ∼6.1 K. A room-temperature sample surface potential versus charge transfer scan indicates that there are at least two two-phase regions for x between 1 and 0.5. A rattling model of superconductivity for the title compound has been examined using electrochemical potassium de-intercalation. The significant reduction of superconducting volume fraction due to minor potassium reduction suggests the importance of defect and phase coherence in the rattling model. Magnetic susceptibility, resistivity, and specific heat measurement results have been compared between the superconducting and spin-glass-like samples.

AB - β-pyrochore KOs2O6, which shows superconductivity below ∼9.7 K, has been converted into KxOs 2O6 (x 23-12) electrochemically to show spin-glass-like behavior below ∼6.1 K. A room-temperature sample surface potential versus charge transfer scan indicates that there are at least two two-phase regions for x between 1 and 0.5. A rattling model of superconductivity for the title compound has been examined using electrochemical potassium de-intercalation. The significant reduction of superconducting volume fraction due to minor potassium reduction suggests the importance of defect and phase coherence in the rattling model. Magnetic susceptibility, resistivity, and specific heat measurement results have been compared between the superconducting and spin-glass-like samples.

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Superconducting to spin-glass state transformation in β-pyrochlore K_xOs₂O₆

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