Magnetic Field-Temperature Scaling in the Magnetotransport Properties of Unconventional Superconductors.

The transport proeprties of unconventional superconductors and other quantum critical metals deviates strongly from the conventional theory of transport in metals. The dramatic T-linear temperature dependence observed in cuprate, iron-pnicitde and heavy fermion superconductors is thought to be a signature of quantum critical physics and is often used as evidence for the proximity to a quantum critical point. We discover that this same physics may be manifest in the magneto-transport properties of these materials. This talk focuses on a study of the longitudinal and transverse magnetoresistance in unconventional superconductors near putative quantum critical points. We reveal a new manifestation of this physics, leading to an unusual scaling relationship in field and temperature.