Doping dependence of the coupling of electrons to bosonic modes in the single-layer high-temperature Bi2Sr2CuO6 superconductor

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A recent highlight in the study of high-Tc superconductors is the observation of band renormalization or self-energy effects on the quasiparticles. This is seen in the form of kinks in the quasiparticle dispersions as measured by photoemission and interpreted as signatures of collective bosonic modes coupling to the electrons. Here we compare for the first time the self-energies in an optimally doped and strongly overdoped, nonsuperconducting single-layer Bi-cuprate (Bi{sub 2}Sr{sub 2}CuO{sub 6}). In addition to the appearance of a strong overall weakening, we also find that the weight of the self-energy in the overdoped system shifts to higher energies. We ... continued below

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Meevasana, W. June 2, 2010.

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A recent highlight in the study of high-Tc superconductors is the observation of band renormalization or self-energy effects on the quasiparticles. This is seen in the form of kinks in the quasiparticle dispersions as measured by photoemission and interpreted as signatures of collective bosonic modes coupling to the electrons. Here we compare for the first time the self-energies in an optimally doped and strongly overdoped, nonsuperconducting single-layer Bi-cuprate (Bi{sub 2}Sr{sub 2}CuO{sub 6}). In addition to the appearance of a strong overall weakening, we also find that the weight of the self-energy in the overdoped system shifts to higher energies. We present evidence that this is related to a change in the coupling to c-axis phonons due to the rapid change of the c-axis screening in this doping range.

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  • Journal Name: Submitted to Physical Review Letters; Journal Volume: 96; Journal Issue: 15

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  • Report No.: SLAC-PUB-14062
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 981369
  • Archival Resource Key: ark:/67531/metadc1013172

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  • June 2, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 2, 2017, 8:10 p.m.

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Meevasana, W. Doping dependence of the coupling of electrons to bosonic modes in the single-layer high-temperature Bi2Sr2CuO6 superconductor, article, June 2, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1013172/: accessed January 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.