Eliashberg analysis of the optical conductivity in superconducting Pr2CuOx with x ≃ 4
| Autor: | Ricardo P. S. M. Lobo, G. Chanda, Ewald Schachinger, Michio Naito, A. V. Pronin |
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| Rok vydání: | 2015 |
| Předmět: |
Superconductivity
Physics Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Scattering Condensed Matter - Superconductivity FOS: Physical sciences Inverse Condensed Matter Physics Omega Optical conductivity Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Impurity Condensed Matter::Superconductivity General Materials Science Charge carrier Boson |
| Zdroj: | Journal of physics. Condensed matter : an Institute of Physics journal. 27(4) |
| ISSN: | 1361-648X |
| Popis: | Superconducting Pr$_2$CuO$_x$, $x\simeq 4$ films with $T^\prime$ structure and a $T_c$ of 27 K have been investigated by millimeter-wave transmission and broadband (infrared-to-ultraviolet) reflectivity measurements in the normal and superconducting state. The results obtained by both experimental methods show a consistent picture of the superconducting condensate formation below $T_c$. An Eliashberg analysis of the data proves $d$-wave superconductivity and unitary-limit impurity scattering of the charge carriers below $T_{c}$. The derived electron-exchange boson interaction spectral function $I^2\chi(\omega)$ shows only marginal changes at the superconducting transition with the mass enhancement factor $\lambda$, the first inverse moment of $I^2\chi(\omega)$, being equal to 4.16 at 30 K and to 4.25 at 4 K. Comment: IOP style, 12 pages |
| Databáze: | OpenAIRE |
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