Fully gapped single-particle excitations in lightly doped cuprates

K. M. Shen, T. Yoshida, D. H. Lu, F. Ronning, N. P. Armitage, W. S. Lee, X. J. Zhou, A. Damascelli, D. L. Feng, N. J.C. Ingle, H. Eisaki, Y. Kohsaka, H. Takagi, T. Kakeshita, S. Uchida, P. K. Mang, M. Greven, Y. Onose, Y. Taguchi, Y. TokuraSeiki Komiya, Yoichi Ando, M. Azuma, M. Takano, A. Fujimori, Z. X. Shen

研究成果: Article査読

44 被引用数 (Scopus)

抄録

The low-energy excitations of the lightly doped cuprates were studied by angle-resolved photoemission spectroscopy. A finite gap was measured over the entire Brillouin zone, including along the dx2-y2 nodal line. This effect was observed to be generic to the normal states of numerous cuprates, including hole-doped La2-xSrxCuO4 and Ca2-xNaxCuO2Cl2 and electron-doped Nd2-xCexCuO4. In all compounds, the gap appears to close with increasing carrier doping. We consider various scenarios to explain our results, including the possible effects of chemical disorder, electronic inhomogeneity, and a competing phase.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
69
5
DOI
出版ステータスPublished - 2004 2月 17
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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