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arxiv: cond-mat/0503117 · v3 · submitted 2005-03-05 · ❄️ cond-mat.supr-con · cond-mat.str-el

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
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M. Falub M. Shi L. Patthey A. Damascelli
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classification ❄️ cond-mat.supr-con cond-mat.str-el
keywords arpesfermioverdopedquasiparticlesurfacetl2ba2cuo6althoughapproaching
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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.

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