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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 (+8 others)
2007 Physical Review Letters  

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2006 pre-print arXiv:cond-mat/0607450v1 fatcat:lj2yfjcdwbgldiz75abl2k6fru
In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure calculation very well. The incoherent nature of the spectra suggests that the hopping-dominated dispersion occurs possibly with the assistance of local spin correlations. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a
more » ... doped cuprate in the low energy region. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.
doi:10.1103/physrevlett.98.147001 pmid:17501304 fatcat:mg6g2634vrdbhidpmliznwsa6y
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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, D. L. Feng. "High-Energy Scale Revival and Giant Kink in the Dispersion of a Cuprate Superconductor." Physical Review Letters 98.14 (2007)