Superfluid density of Ba(Fe1-xMx)(2)As-2 from optical experiments

作者：Wu D^*; Barisic N; Drichko N; Kallina P; Faridian A; Gorshunov B; Dressel M; Li L J; Lin X; Cao G H; Xu Z A

来源：Physica C-Superconductivity and Its Applications, 2010, 470: S399-S400.

DOI：10.1016/j.physc.2009.10.142

• Iron pnictides
• Superconductivity
• Optical properties

The temperature dependence of the ab-plane optical reflectivity of Ba(Fe0.92Co0.08)(2)As-2 and Ba(Fe-0.95 Ni-0.05)(2)As-2 single crystals is measured in a wide spectral range. Upon entering the superconducting regime, the reflectivity in both compounds increases considerably at low-frequency, leading to a clear gap in the optical conductivity below 100 cm(-1). From the analysis of the complex conductivity spectra we obtain the penetration depth lambda(T) = (3500 +/- 350) angstrom for Ba(Fe0.92Co0.08)(2)As-2 and (3000 +/- 300) angstrom for Ba(Fe0.95Ni0.05)(2)As-2.

• 出版日期2010-12
• 单位浙江大学