Momentum dependence of the energy gap in the superconducting state of optimally doped Bi2(Sr,R)2CuOy (R=La and Eu)

Y. Okada, T. Takeuchi, M. Ohkawa, A. Shimoyamada, K. Ishizaka, T. Kiss, S. Shin, H. Ikuta

研究成果: Article査読

3 被引用数 (Scopus)

抄録

The energy gap of optimally doped Bi2(Sr,R)2CuO y (R=La and Eu) was probed by angle resolved photoemission spectroscopy (ARPES) using a vacuum ultraviolet laser (photon energy 6.994 eV) or He Iα resonance line (21.218 eV) as photon source. The results show that the gap around the node at sufficiently low temperatures can be well described by a monotonic d-wave gap function for both samples and the gap of the R=La sample is larger reflecting the higher Tc. However, an abrupt deviation from the d-wave gap function and an opposite R dependence for the gap size were observed around the antinode, which represent a clear disentanglement between the antinodal pseudogap and the nodal superconducting gap.

本文言語English
論文番号052197
ジャーナルJournal of Physics: Conference Series
150
5
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

フィンガープリント 「Momentum dependence of the energy gap in the superconducting state of optimally doped Bi<sub>2</sub>(Sr,R)<sub>2</sub>CuO<sub>y</sub> (R=La and Eu)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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