Abstract
The band renormalizations of optimally-doped Bi2223 system were studied by angle-resolved photoemission spectroscopy. In the superconducting state, we found that the band renormalizations are dominated by one bosonic mode. In the normal state, the band renormalizations are weak, but still observable. To better visualize the renormalization features in the normal state, we extracted the real part of the self-energy, ReΣ, in which we found a shoulder at about 35 meV in addition to the maximum at about 70 meV. This result suggests that multiple bosonic modes contribute to the band renormalizations, instead of just one single mode. These modes are likely oxygen related optical phonon mode. Compared to the extracted ReΣ in the superconducting state, we show that the renormalization effect exhibits an interesting and subtle temperature dependence at the nodal region.
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© 2007 Springer-Verlag Berlin Heidelberg
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Lee, W.S. et al. (2007). Band Renormalization Effect in Bi2Sr2Ca2Cu3O10+δ . In: Bussmann-Holder, A., Keller, H. (eds) High Tc Superconductors and Related Transition Metal Oxides. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-71023-3_18
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DOI: https://doi.org/10.1007/978-3-540-71023-3_18
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-71022-6
Online ISBN: 978-3-540-71023-3
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