Evaluation of superconducting gaps in optimally doped Ba(Fe1-xCox)2As2/Fe bilayers by ultrafast time-resolved spectroscopy

被引：4
|
作者：
Bonavolonta, C. [1 ,2 ]
de Lisio, C. [1 ,2 ]
Valentino, M. [2 ]
Parlato, L. [1 ,2 ]
Pepe, G. P. [1 ,2 ]
Kurth, F. [3 ]
Iida, K. [3 ]
机构：
[1] Univ Napoli Federico II, Fac Ingn, Dipartimento Sci Fis, I-80125 Naples, Italy
[2] CNR SPIN, I-80125 Naples, Italy
[3] IFW Dresden, D-01171 Dresden, Germany
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2014年 / 503卷
关键词：
Pump-probe technique; Iron-based superconductor; Superconducting gap; DYNAMICS;
D O I：
10.1016/j.physc.2014.04.013
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Measurements of nonequilibrium quasi-particle relaxation dynamics by using ultrafast pump and probe technique in optimally Co-doped Ba(Fe2As2)/Fe thin film has been reported. Multiple relaxation processes are present with BCS-like temperature-dependent superconducting gaps Delta(0) = (3.67 +/- 0.13) meV and Delta(1) = (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 lambda = 0.18 has been obtained. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：132 / 135
页数：4
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