Isotropic superconducting state and high critical currents in Fe1+yTe1-xSx single crystals

Rongwei Hu, J. B. Warren, C. Petrovic

We report single crystal growth and a study of superconducting properties in Fe_{1+y}Te_{1-x}S_{x}. We demonstrate the smallest upper critical field anisotropy, gamma=H_{c2}^{//c}/…