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24 April 2024

» arxiv » cond-mat/0503117

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Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES
M. Plate ; J.D.F. Mottershead ; I.S. Elfimov ; D.C. Peets ; Ruixing Liang ; D.A. Bonn ; W.N. Hardy ; S. Chiuzbaian ; M. Falub ; M. Shi ; L. Patthey ; A. Damascelli ;
Date:	5 Mar 2005
Journal:	PRL 95, 077001 (2005)
Subject:	Superconductivity; Strongly Correlated Electrons \| cond-mat.supr-con cond-mat.str-el
Abstract:	The electronic structure of the high-T_c superconductor Tl2Ba2CuO6+d is studied by ARPES. For a very overdoped Tc=30K sample, the Fermi surface consists of a single large hole pocket centered at (pi,pi) and is approaching a topological transition. Although a superconducting gap with d_x^2-y^2 symmetry is tentatively identified, the quasiparticle evolution with momentum and binding energy exhibits a marked departure from the behavior observed in under and optimally doped cuprates. The relevance of these findings to scattering, many-body, and quantum-critical phenomena is discussed.
Source:	arXiv, cond-mat/0503117
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