会议论文详细信息
11th European Conference on Applied Superconductivity | |
Femtosecond spectroscopy in a nearly optimally doped Fe-based superconductors FeSe0.5Te0.5 and Ba(Fe1?xCox)2As2/Fe thin film | |
Bonavolontà, C.^1,2 ; Parlato, L.^1,2 ; De Lisio, C.^1,2 ; Valentino, M.^1,2 ; Pepe, G.P.^1,2 ; Kazumasa, I.^3 ; Kurth, F.^3 ; Bellingeri, E.^4 ; Pallecchi, I.^4 ; Putti, M.^4 ; Ferdeghini, C.^4 ; Ummarino, G.A.^5 ; Laviano, F.^5 | |
Department of Physics, University of Naples Federico II, Italy^1 | |
CNR-SPIN, Piazzale Tecchio 80, Naples | |
80125, Italy^2 | |
IFW Dresden, P. O. Box 270116, Dresden | |
01171, Germany^3 | |
CNR-SPIN, Corso Perrone 24, Genova | |
16152, Italy^4 | |
Dipartimento di Fisica and CNISM, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino | |
10129, Italy^5 | |
关键词: Electron phonon; Excitation spectrum; Femtosecond spectroscopy; Quasi particles; Superconducting energy gap; Superconducting state; Temperature dependence; Thin films growth; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012004/pdf DOI : 10.1088/1742-6596/507/1/012004 |
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来源: IOP | |
【 摘 要 】
Femtosecond spectroscopy has been used to investigate the quasi-particle relaxation times in nearly optimally doped Fe-based superconductors FeSe0.5Te0.5and 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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