Microwave quasiparticle conductivity of LaFePO single crystals

S. Tonegawa, K. Hashimoto, K. Ikada, M. Yamashita, H. Sugawara, T. Shibauchi, Y. Matsuda

研究成果: Article査読

抄録

We measured the temperature dependence of the microwave quasiparticle conductivity σ1(T) in single crystals of LaFePO (T c≃7.5K) to study the presence/absence of the coherence peak expected in s-wave superconductors. We use sensitive cavity resonators at several frequencies (15,28,60GHz). We observe a broad enhancement of σ1(T) below Tc which is almost independent of frequency. We find that such a frequency-independent enhancement is incompatible with the conventional coherence peak, and rather it can be explained by the rapid change of quasiparticle dynamics below Tc due to strong suppression of electron-electron inelastic scattering.

本文言語English
ページ(範囲)S433-S434
ジャーナルPhysica C: Superconductivity and its applications
470
SUPPL.1
DOI
出版ステータスPublished - 2010 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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