Full-gap superconductivity with strong electron correlations in the β-pyrochlore KOs2O6

Y. Kasahara, Y. Shimono, T. Kato, K. Hashimoto, T. Shibauchi, Y. Matsuda, S. Yonezawa, Yuji Muraoka, J. Yamaura, Y. Nagao, Z. Hiroi

Research output: Contribution to journalArticle

Abstract

To elucidate the superconducting gap structure and the influence of rattling motion on quasiparticle dynamics in the superconducting state of KOs2O6, the thermal conductivity and microwave surface impedance were measured at low temperatures. The magnetic field dependence of thermal conductivity and temperature dependence of penetration depth demonstrate full-gap superconductivity in KOs2O6. The quasiparticle scattering time is strongly enhanced in the superconducting state, indicating a strong electron inelastic scattering in the normal state. These results highlight that KOs2O6 is unique among superconductors with strong electron correlations.

Original languageEnglish
Pages (from-to)1068-1070
Number of pages3
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - Apr 1 2008
Externally publishedYes

Fingerprint

Electron correlations
Superconductivity
Thermal conductivity
Penetration depth (superconductivity)
thermal conductivity
superconductivity
Inelastic scattering
Electron scattering
Superconducting materials
electron scattering
inelastic scattering
electrons
penetration
Microwaves
impedance
Scattering
Magnetic fields
microwaves
Temperature
temperature dependence

Keywords

  • β-pyrochlore oxide superconductors
  • Microwave surface impedance
  • Rattling
  • Thermal conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kasahara, Y., Shimono, Y., Kato, T., Hashimoto, K., Shibauchi, T., Matsuda, Y., ... Hiroi, Z. (2008). Full-gap superconductivity with strong electron correlations in the β-pyrochlore KOs2O6. Physica B: Condensed Matter, 403(5-9), 1068-1070. https://doi.org/10.1016/j.physb.2007.10.090

Full-gap superconductivity with strong electron correlations in the β-pyrochlore KOs2O6. / Kasahara, Y.; Shimono, Y.; Kato, T.; Hashimoto, K.; Shibauchi, T.; Matsuda, Y.; Yonezawa, S.; Muraoka, Yuji; Yamaura, J.; Nagao, Y.; Hiroi, Z.

In: Physica B: Condensed Matter, Vol. 403, No. 5-9, 01.04.2008, p. 1068-1070.

Research output: Contribution to journalArticle

Kasahara, Y, Shimono, Y, Kato, T, Hashimoto, K, Shibauchi, T, Matsuda, Y, Yonezawa, S, Muraoka, Y, Yamaura, J, Nagao, Y & Hiroi, Z 2008, 'Full-gap superconductivity with strong electron correlations in the β-pyrochlore KOs2O6', Physica B: Condensed Matter, vol. 403, no. 5-9, pp. 1068-1070. https://doi.org/10.1016/j.physb.2007.10.090
Kasahara Y, Shimono Y, Kato T, Hashimoto K, Shibauchi T, Matsuda Y et al. Full-gap superconductivity with strong electron correlations in the β-pyrochlore KOs2O6. Physica B: Condensed Matter. 2008 Apr 1;403(5-9):1068-1070. https://doi.org/10.1016/j.physb.2007.10.090
Kasahara, Y. ; Shimono, Y. ; Kato, T. ; Hashimoto, K. ; Shibauchi, T. ; Matsuda, Y. ; Yonezawa, S. ; Muraoka, Yuji ; Yamaura, J. ; Nagao, Y. ; Hiroi, Z. / Full-gap superconductivity with strong electron correlations in the β-pyrochlore KOs2O6. In: Physica B: Condensed Matter. 2008 ; Vol. 403, No. 5-9. pp. 1068-1070.
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AU - Shibauchi, T.

AU - Matsuda, Y.

AU - Yonezawa, S.

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