1. Femtosecond spectroscopy in a nearly optimally doped Fe-based superconductors FeSe0.5Te0.5and Ba(Fe1−xCox)2As2/Fe thin film
- Author
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Emilio Bellingeri, I. Pallecchi, Giovanni Ummarino, C. Bonavolontà, G. P. Pepe, C. de Lisio, Fritz Kurth, Carlo Ferdeghini, I. Kazumasa, L. Parlato, Francesco Laviano, Mario Putti, M. Valentino, C., Bonavolont?, Parlato, Loredana, DE LISIO, Corrado, M., Valentino, Pepe, GIOVANNI PIERO, I., Kazumasa, F., Kurth, E., Bellingeri, I., Pallecchi, M., Putti, C., Ferdeghini, G. A., Ummarino, and F., Laviano
- Subjects
Superconductivity ,History ,Materials science ,Condensed matter physics ,Doping ,Relaxation (NMR) ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Computer Science Applications ,Education ,Condensed Matter::Superconductivity ,0103 physical sciences ,Fe based ,Thin film ,010306 general physics ,0210 nano-technology ,Layer (electronics) ,Femtochemistry ,Excitation - Abstract
Femtosecond spectroscopy has been used to investigate the quasi-particle relaxation times in nearly optimally doped Fe-based superconductors FeSe 0.5Te0.5 and optimally doped Ba-122 thin films growth on a Fe buffer layer. Experimental results concerning the temperature dependence of the relaxation time of such pnictides both in the superconducting state are now presented and discussed. Modelling the T-dependence of relaxation times an estimation of both electron-phonon constant and superconducting energy gap in the excitation spectrum of both Fe(Se,Te) and Ba-122 compounds is obtained.
- Published
- 2014
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