We present results from the study of a highly overdoped (OD) Bi2212 with a Tc=51K using high resolution angle-resolved photoemission spectroscopy. The temperature dependent spectra near the (π,0) point show the presence of the sharp peak well above Tc. From the nodal direction, we make comparison of the self-energy with the optimally doped and underdoped cuprates, and the Mo(110) surface state. We show that this OD cuprate appears to have properties that approach that of the Mo. Further analysis shows that the OD has a more k-independent lineshape at the Fermi surface than the lower-doped cuprates. This allows for a realistic comparison of the nodal lifetime values to the experimental resistivity measurements via Boltzmann transport formulation. All these observations point to the validity of the quasiparticle picture for the OD even in the normal state within a certain energy and momentum range.
@article{arxiv.cond-mat/0104367,
title = {Quasiparticle Liquid in the Highly Overdoped Bi2212},
author = {Z. Yusof and B. O. Wells and T. Valla and A. V. Fedorov and P. D. Johnson and Q. Li and C. Kendziora and Sha Jian and D. G. Hinks},
journal= {arXiv preprint arXiv:cond-mat/0104367},
year = {2009}
}