Anisotropy of normal and superconducting states of FeSeTe

We report anisotropic electrical and thermal transport measurements in non-superconducting parent FeTe and superconduicting optimally doped FeTeSe. Intrinsic in- plane anisotropy of the electrical resistivity was measured in mechanically detwinned crystals of the parent compound [1]. In-plane and inter-plane heat transport was used to probe the symmetry of the superconducting gap in the material close to optimal doping (Tc=15~K). The results are compared to those of superconducting FeSe [2] and doping evolution of thermal conductivity in BaFe2As2 doped with cobalt [3,4]. [1] M.A. Tanatar, {\it et al.} Phys. Rev. B {\bf 81}, 184508 (2010). [2] J. K. Dong, {\it et al.} Phys. Rev. B {\bf 80}, 024518 (2009). [3] M. A. Tanatar, {\it et al.} Phys. Rev.Lett. {\bf 104}, 067002 (2010). [4] J.-Ph. Reid, {\it et al.} Phys. Rev. B {\bf 82}, 064501 (2010).