Multiband character of $\beta$-FeSe: Angular dependence of the magnetoresistance and upper critical field

M. L. Amigó, V. Ale Crivillero, D. G. Franco +1

We studied $ab$-plane transport properties in single crystals of the superconductor $\beta$-FeSe up to 16 T. In the normal state, below 90 K, the crystals present a strongly anisotropi…