Yusof ZM, Wells BO, Valla T, Fedorov AV, Johnson PD, Li Q, Kendziora C, Jian S, Hinks DG. Quasiparticle liquid in the highly overdoped Bi(2)Sr(2)CaCu(2)O(8+delta).
Phys Rev Lett 2002;
88:167006. [PMID:
11955253 DOI:
10.1103/physrevlett.88.167006]
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Abstract
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.
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