Three energy scales characterizing the competing pseudogap state, the incoherent, and the coherent superconducting state in high-Tc cuprates

Y. Okada*, T. Kawaguchi, M. Ohkawa, K. Ishizaka, T. Takeuchi, S. Shin, H. Ikuta

*この研究の対応する著者

研究成果査読

22 被引用数 (Scopus)

抄録

We have studied the momentum dependence of the energy gap of Bi 2(Sr,R)2CuOy by angle-resolved photoemission spectroscopy (ARPES), particularly focusing on the difference between R=La and Eu. By comparing the gap function and characteristic temperatures between the two sets of samples, we show that there exist three distinct energy scales, Δpg, Δsc0, and Δsc0eff, which correspond to T* (pseudogap temperature), Tonset (onset temperature of fluctuating superconductivity), and Tc (critical temperature of coherent superconductivity). The results not only support the existence of a pseudogap state below T* that competes with superconductivity, but also the duality of competition and superconducting fluctuation at momenta around the antinode below Tonset.

本文言語English
論文番号104502
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
83
10
DOI
出版ステータスPublished - 2011 3 10
外部発表はい

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

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