Role of bosonic modes in the mechanism of high temperature Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$ superconductors using ultrafast optical techniques

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dc.creatorZhu, Jian-Xin
dc.creatorChia, Elbert E. M.
dc.creatorTamegai, T.
dc.creatorEisaki, H.
dc.creatorOh, Kyu-Hwan
dc.creatorLee, S. -I.
dc.creatorTaylor, A. J.
dc.date2008-06-16
dc.date.accessioned2026-07-07T09:44:58Z
dc.date.available2026-07-07T09:44:58Z
dc.descriptionUsing ultrafast optical techniques, we probe the hole-doping dependence of the electron-boson coupling constant $λ$ in Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$. In the overdoped region, we observe a correlation between ($λ$) and the superconducting transition temperature $T_{c}$. Upon performing the McMillan analysis, however, we find that $λ$ is too small to explain the high $T_{c}$'s, and that the Coulomb pseudopotential $μ^{\ast}$ is negative. Our analysis therefore reveals two components in the mechanism of high-$T_{c}$ superconductivity -- a dominant pre-existing pairing interaction, together with a weaker electron-phonon interaction that fine-tunes $T_{c}$.
dc.description4 pages, 4 eps figures
dc.identifierhttps://arxiv.org/abs/0806.2664
dc.identifierhttp://arxiv.org/abs/0806.2664
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163059
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleRole of bosonic modes in the mechanism of high temperature Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$ superconductors using ultrafast optical techniques
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