Microwave penetration depth and quasiparticle conductivity of PrFeAsO1-y single crystals: Evidence for a full-gap superconductor

K. Hashimoto, T. Shibauchi, T. Kato, K. Ikada, R. Okazaki, H. Shishido, M. Ishikado, H. Kito, A. Iyo, H. Eisaki, S. Shamoto, Y. Matsuda

研究成果: Article査読

224 被引用数 (Scopus)

抄録

In-plane microwave penetration depth λab and quasiparticle conductivity at 28 GHz are measured in underdoped single crystals of the Fe-based superconductor PrFeAsO1-y (Tc> 35K) by using a sensitive superconducting cavity resonator. λab(T) shows flat dependence at low temperatures, which is incompatible with the presence of nodes in the superconducting gap Δ(k). The temperature dependence of the superfluid density demonstrates that the gap is nonzero (Δ/kBT> 1.6) all over the Fermi surface. The microwave conductivity below Tc exhibits an enhancement larger than the coherence peak, reminiscent of high-Tc cuprate superconductors.

本文言語English
論文番号017002
ジャーナルPhysical review letters
102
1
DOI
出版ステータスPublished - 2009 1月 5
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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