Calorimetric Evidence for Nodes in the Overdoped Ba(Fe${}_{0.9}$Co${}_{0.1}$)${}_2$As${}_2$

Dong-Jin Jang, A. B. Vorontsov, I. Vekhter +9

We present low-temperature specific heat of the electron-doped Ba(Fe${}_{0.9}$Co${}_{0.1}$)${}_2$As${}_2$, which does not show any indication of an upturn down to 400 mK, the lowest me…