Archivio Istituzionale della RicercaFemtosecond spectroscopy has been used to investigate the quasi-particle relaxation times in nearly optimally doped Fe-based superconductors FeSe0.5Te0.5 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.
Femtosecond spectroscopy in a nearly optimally doped Fe-based superconductors FeSe0.5Te0.5and Ba(Fe1−xCox)2As2/Fe thin film / C., Bonavolontà; L., Parlato; C., de Lisio; M., Valentino; G. P., Pepe; I., Kazumasa; F., Kurth; E., Bellingeri; I., Pallecchi; M., Putti; C., Ferdeghini; Ummarino, Giovanni; Laviano, Francesco. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6596. - 507:(2014), p. 012004. [10.1088/1742-6596/507/1/012004]
Femtosecond spectroscopy in a nearly optimally doped Fe-based superconductors FeSe0.5Te0.5and Ba(Fe1−xCox)2As2/Fe thin film
UMMARINO, Giovanni;LAVIANO, FRANCESCO
2014
Abstract
Femtosecond spectroscopy has been used to investigate the quasi-particle relaxation times in nearly optimally doped Fe-based superconductors FeSe0.5Te0.5 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.
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https://hdl.handle.net/11583/2544949
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