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arXiv · 0708.2782

Anisotropic quasiparticle scattering rates in slightly underdoped to optimally doped high-temperature \LSCO\ superconductors

J. Chang·M. Shi·S. Pailhes·M. Maansson·T. Claesson·O. Tjernberg·A. Bendounan·Y. Sassa·L. Patthey·N. Momono·M. Oda·M. Ido·S. Guerrero C. Mudry·J. Mesot
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Abstract

An angle-resolved photoemission study of the scattering rate in the superconducting phase of the high-temperature superconductor \LSCO\ with $x=0.145$ and $x=0.17$, as a function of binding energy and momentum, is presented. We observe that the scattering rate scales linearly with binding energy up to the high-energy scale $E_1\sim0.4$ eV. The scattering rate is found to be strongly anisotropic, with a minimum along the (0,0)-($\pi,\pi$) direction. A possible connection to a quantum-critical point is discussed.

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J. Chang, M. Shi, S. Pailhes, M. Maansson, T. Claesson, O. Tjernberg, A. Bendounan, Y. Sassa, L. Patthey, N. Momono, M. Oda, M. Ido, S. Guerrero C. Mudry, J. Mesot. 2007-08-21. Anisotropic quasiparticle scattering rates in slightly underdoped to optimally doped high-temperature \LSCO\ superconductors. https://doi.org/10.1103/physrevb.78.205103

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