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20 April 2024

» arxiv » cond-mat/0011172

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Electron-Like Fermi Surface and Remnant (pi,0) Feature in Overdoped La1.78Sr0.22CuO4
T. Yoshida ; X. J. Zhou ; M. Nakamura ; S. A. Kellar ; P. V. Bogdanov ; E. D. Lu ; A. Lanzara ; Z. Hussain ; A. Ino ; T. Mizokawa ; A. Fujimori ; H. Eisaki ; C. Kim ; Z.-X. Shen ; T. Kakeshita ; S. Uchida ;
Date:	10 Nov 2000
Journal:	Phys. Rev. B 63, 220501 (2001)
Subject:	Superconductivity; Strongly Correlated Electrons \| cond-mat.supr-con cond-mat.str-el
Abstract:	We have performed an angle-resolved photoemission study of overdoped La1.78Sr0.22CuO4, and have observed sharp nodal quasiparticle peaks in the second Brillouin zone that are comparable to data from Bi2Sr2CaCu2O8+d. The data analysis using energy distribution curves, momentum distribution curves and intensity maps all show evidence of an electron-like Fermi surface, which is well explained by band structure calculations. Evidence for many-body effects are also found in the substantial spectral weight remaining below the Fermi level around (pi,0), where the band is predicted to lie above EF.
Source:	arXiv, cond-mat/0011172
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