Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides

Details Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides

2009-12-07

arxiv.org/abs/0912.1256v1

Phys. Rev. B 81, 060509(R) (2010)

Physics

Condensed Matter

Superconductivity

4pages,3figures

Scientific paper

10.1103/PhysRevB.81.060509

The temperature-dependent optical reflectivity and complex transmissivity of an epitaxially grown Ba(Fe$_{0.9}$Co$_{0.1}$)$_2$As$_2$ thin film were measured and the optical conductivity and permittivity evaluated over a wide frequency range. The opening of the superconducting gap $2\Delta_0 = 3.7$ meV below $T_c\approx 20$ K is {\em directly} observed by a completely vanishing optical conductivity. The temperature and frequency dependent electrodynamic properties of Ba(Fe$_{0.9}$Co$_{0.1}$)$_2$As$_2$ in the superconducting state agree well with the BCS predictions with no nodes in the order parameter. The spectral weight of the condensate $1.94\times 10^7 {\rm cm}^{-2}$ corresponds to a London penetration depth $\lambda_L=3600$ \AA.

Affiliated with

Also associated with

No associations

Rating

Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-243427