Physics – Condensed Matter – Superconductivity
Scientific paper
2009-06-24
Chin. Phys. Lett. 27, 037402 (2010)
Physics
Condensed Matter
Superconductivity
5 pages, 4 figures, some discussions modified or added
Scientific paper
Low-temperature specific heat (SH) and resistivity were measured on Ba(Fe_{1-x}Co_x)_2As_2 single crystals in wide doping region. A sizeable residual specific heat coefficient \gamma_0 was observed in the low temperature limit of all samples. The specific heat jump near T_c, i.e. \Delta C/T|_{T_c} and the upper critical field H_{c2}^c (H||c) were also determined. It is found that -\gamma_0, \Delta C/T|_{T_c}, \sqrt{H_{c2}^c} and T_c all shared a similar evolution with doping. All these can be well understood within the model of S$^\pm$ pairing symmetry when accounting the Co-dopants as unitary scattering centers in the FeAs planes. Our results give a direct evidence for the violation of the Anderson theorem in FeAs-based superconductors.
Cheng Peng
Fang Lei
Mu Gang
Ren Cong
Shan Lei
No associations
LandOfFree
Impurity Scattering Effect on Superconductivity and the Violation of Anderson Theorem in Ba(Fe_{1-x}Co_x)_2As_2 Single Crystals 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 Impurity Scattering Effect on Superconductivity and the Violation of Anderson Theorem in Ba(Fe_{1-x}Co_x)_2As_2 Single Crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impurity Scattering Effect on Superconductivity and the Violation of Anderson Theorem in Ba(Fe_{1-x}Co_x)_2As_2 Single Crystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-106377