Multiple bosonic mode coupling in the charge dynamics of the electron-doped superconductor (Pr$_{2-x}$Ce$_x$)CuO$_4$

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dc.creatorSchachinger, E.
dc.creatorHomes, C. C.
dc.creatorLobo, R. P. S. M.
dc.creatorCarbotte, J. P.
dc.date2008-03-03
dc.date2008-09-27
dc.date.accessioned2026-07-07T10:11:20Z
dc.date.available2026-07-07T10:11:20Z
dc.descriptionWe analyze optical spectroscopy data of the electron-doped superconductor (Pr$_{2-x}$Ce$_x$)CuO$_4$ (PCCO) to investigate the coupling of the charge carriers to bosonic modes. The method of analysis is the inversion of the optical scattering rate $τ^{-1}_{\rm op}(ω,T)$ at different temperatures $T$ by means of maximum entropy technique combined with Eliashberg theory. We find that in the superconducting state the charge carriers couple to two dominant modes one at $\sim 10 $meV and a second one at $\sim 45 $meV. The low energy mode shows a strong temperature dependence and disappears at or slightly above the critical temperature $T_c$. The high energy mode exists above $T_c$ and moves towards higher energies with increasing temperatures. It also becomes less prominent at temperatures $> 100 $K above which it evolves into a typical spin-fluctuation background. In contrast to the hole-doped High-$T_c$ superconductors PCCO proves to be a superconductor close to the dirty limit.
dc.description10 pages, 8 figures submitted to Physical Review B
dc.identifierhttps://arxiv.org/abs/0803.0222
dc.identifierhttp://arxiv.org/abs/0803.0222
dc.identifierPhys. Rev. B 78, 134522 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.134522
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/171835
dc.subjectSuperconductivity
dc.titleMultiple bosonic mode coupling in the charge dynamics of the electron-doped superconductor (Pr$_{2-x}$Ce$_x$)CuO$_4$
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