A doping dependent specific heat study of the superconducting gap in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$

K. Gofryk, A. S. Sefat, M. A. McGuire +5

We report a doping, magnetic field and low-temperature dependent study of the specific heat of the iron-arsenide Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ at under (x=0.045), optimal (x…