Quasiparticle liquid in the highly overdoped Bi(2)Sr(2)CaCu(2)O(8+delta).
Results from the study of a highly overdoped (OD) Bi(2)Sr(2)CaCu(2)O(8+delta) with a T(c) = 51 K using angle-resolved photoemission spectroscopy are presented. We observe a sharp peak in the spectra near ( pi,0) that persists well above T(c), a nodal self-energy which approaches that seen for the Mo(110) surface state, and a more k-independent line shape at the Fermi surface than the lower-doped cuprates. This allows for a realistic comparison of the lifetime values to the experimental resistivity measurements. These observations point to the validity of the quasiparticle picture for the OD even in the normal state.
Yusof
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ZM
Department of Physics, University of Connecticut, 2152 Hillside Road U-46, Storrs, Connecticut 06269-3046, USA.
Wells
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Valla
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Fedorov
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Johnson
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Li
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Kendziora
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Jian
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Hinks
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