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Normal State Spectral Lineshapes of Nodal Quasiparticles in Single Layer Bi2201 Superconductor [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
SLAC National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A detailed study of the normal state photoemission lineshapes and quasiparticle dispersion for the single layer Bi₂Sr{sub 2-x}LaₓCuO{sub 6+δ}(Bi2201) superconductor is presented. We report the first experimental evidence of a double peak structure and a dip of spectral intensity in the energy distribution curves (EDCs) along the nodal direction. The double peak structure is well identified in the normal state, up to ten times the critical temperature. As a result of the same self-energy effect, a strong mass renormalization of the quasiparticle dispersion, i.e. kink, and an increase of the quasiparticle lifetime in the normal state are also observed. Our results provide unambiguous evidence on the existence of bosonic excitation in the normal state, and support a picture where nodal quasiparticles are strongly coupled to the lattice.
Report Numbers
E 1.99:slac-pub-14071
slac-pub-14071
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Note
Published through SciTech Connect.
04/30/2010.
"slac-pub-14071"
Submitted to Journal of Physics and Chemistry of Solids FT
Lanzara, A.
Funding Information
AC02-76SF00515
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