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Title: Doping dependence of the electron–phonon and electron–spin fluctuation interactions in the high-Tc superconductor Bi2Sr2CaCu2O8+δ
Authors: Springer, D.
Nair, S. K.
Zou, X. Q.
Cheong, S. A.
Panagopoulos, C.
Tamegai, T.
Eisaki, H.
Ishida, S.
Uchida, S.
Taylor, A. J.
Zhu, J. -X.
Chia, Elbert E. M.
Keywords: DRNTU::Science::Physics::Optics and light
Issue Date: 2013
Source: Chia, E. E. M., Springer, D., Nair, S. K., Zou, X. Q., Cheong, S. A., Panagopoulos, C., et al. (2013). Doping dependence of the electron–phonon and electron–spin fluctuation interactions in the high-Tc superconductor Bi2Sr2CaCu2O8+δ. New journal of physics, 15(10), 103027-.
Series/Report no.: New journal of physics
Abstract: Using ultrafast optical techniques, we detect two types of bosons strongly coupled to electrons in the family of Bi2Sr2CaCu2O8+ (Bi-2212) from the underdoped to overdoped regimes. The different doping dependences of the electron–boson coupling strengths enable us to identify them as phonons and spin fluctuations: electron–phonon coupling ( e−ph) peaks at optimal doping, while electron–spin fluctuation coupling ( e−sf) decreases monotonically with doping. This observation is consistent with two facts: (i) superconductivity is in close proximity with antiferromagnetism at low dopings and (ii) a pronounced lattice renormalization effect at larger dopings.
ISSN: 1367-2630
DOI: 10.1088/1367-2630/15/10/103027
Rights: © 2013 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. This paper was published in New Journal of Physics and is made available as an electronic reprint (preprint) with permission of IOP Publishing Ltd. The paper can be found at the following official DOI: [].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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