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In addition to providing new challenges to our basic understanding condensed matter physics, strange metals such as magnetic oxides and high temperature superconductor cuprates as well as magnetic semiconductors hold great technological promise. By exploring the polarization of transmitted and reflected infrared light induced by a magnetic field, we can find new structure that is hidden from more conventional measurements.

Left to right: Gheorghe Acbas, Myoung-Hwan Kim, John Cerne and Chase Ellis in the lab.

What we measure. A cartoon showing the changes in the polarization of transmitted light that samples produce when a magnetic field is applied