High-Energy Scale Revival and Giant Kink in the Dispersion of a Cuprate Superconductor

B. P. Xie, K. Yang, D. W. Shen, J. F. Zhao, H. W. Ou, J. Wei, S. Y. Gu, M. Arita, S. Qiao, H. Namatame, M. Taniguchi, N. Kaneko, H. Eisaki, K. D. Tsuei, C. M. Cheng, I. Vobornik, J. Fujii, G. Rossi, Z. Q. Yang, and D. L. Feng
Phys. Rev. Lett. 98, 147001 – Published 2 April 2007

Abstract

In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+δ, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure calculation very well. Similar behavior observed in blue bronze and the Mott insulator Ca2CuO2Cl2 suggests that the origin of hopping-dominated dispersion in an overdoped cuprate might be quite complicated. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a doped cuprate. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.

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  • Received 21 May 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.147001

©2007 American Physical Society

Authors & Affiliations

B. P. Xie1, K. Yang1, D. W. Shen1, J. F. Zhao1, H. W. Ou1, J. Wei1, S. Y. Gu1, M. Arita2, S. Qiao2, H. Namatame2, M. Taniguchi2, N. Kaneko3, H. Eisaki3, K. D. Tsuei4, C. M. Cheng4, I. Vobornik5, J. Fujii5, G. Rossi5,6, Z. Q. Yang1, and D. L. Feng1,*

  • 1Department of Physics, Applied Surface Physics State Key Laboratory, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
  • 2Hiroshima Synchrotron Radiation Center and Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
  • 3AIST, 1-1-1 Central 2, Umezono, Tsukuba, Ibaraki, 305-8568 Japan
  • 4National Synchrotron Radiation Research Center and Department of Physics, National Tsing-Hua University, Hsinchu 30077, Taiwan, Republic of China
  • 5CNR-INFM, TASC Laboratory AREA Science Park–Basovizza, 34012, Trieste, Italy
  • 6Dipartimento di Fisica, Universitá di Modena e Reggio Emilia, Via Campi 213/A, I-41100 Modena, Italy

  • *Electronic address: dlfeng@fudan.edu.cn

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Vol. 98, Iss. 14 — 6 April 2007

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