Measurements of nonequilibrium quasi-particle relaxation dynamics by using ultrafast pump and probe technique in optimally Co-doped Ba(Fe 2As2)/Fe thin film has been reported. Multiple relaxation processes are present with BCS-like temperature-dependent superconducting gaps Δ0 = (3.67 ± 0.13) meV and Δ1 = (6.1 ± 0.1) meV, which are calculated considering the conventional electron-boson and spin fluctuations pairing mechanism. Then, the value of the electron-phonon coupling constant of λ = 0.18 has been obtained.
Evaluation of superconducting gaps in optimally doped Ba(Fe1?xCox)2As2/Fe bilayers by ultrafast time-resolved spectroscopy / C., Bonavolont?; DE LISIO, Corrado; M., Valentino; Parlato, Loredana; Pepe, GIOVANNI PIERO; F., Kurth; K., Iida. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - 503:(2014), pp. 132-135. [10.1016/j.physc.2014.04.013]
Evaluation of superconducting gaps in optimally doped Ba(Fe1?xCox)2As2/Fe bilayers by ultrafast time-resolved spectroscopy
DE LISIO, CORRADO;PARLATO, LOREDANA;PEPE, GIOVANNI PIERO;
2014
Abstract
Measurements of nonequilibrium quasi-particle relaxation dynamics by using ultrafast pump and probe technique in optimally Co-doped Ba(Fe 2As2)/Fe thin film has been reported. Multiple relaxation processes are present with BCS-like temperature-dependent superconducting gaps Δ0 = (3.67 ± 0.13) meV and Δ1 = (6.1 ± 0.1) meV, which are calculated considering the conventional electron-boson and spin fluctuations pairing mechanism. Then, the value of the electron-phonon coupling constant of λ = 0.18 has been obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
