Interband Theory of Kerr Rotation in Unconventional Superconductors
Speaker
Prof. Robert Joynt
Department of Physics, University of Wisconsin-Madison, USA
Abstract

Recent experiments have shown rotation of the plane of polarization of light reflected from the surface of some superconductors.  This indicates that time reversal and certain mirror symmetries are broken in the ordered phase. The frequency of the light exceeds the electronic bandwidth. We show that in strong-coupling theory a Coulomb interaction may produce an order parameter in the unoccupied band that explains the observations. Thus we propose that the experiments have detected, for the first time,  the existence of a superconducting order parameter in an unoccupied band.

About the Speaker

Personal Homepage: http://uw.physics.wisc.edu/~joynt/index.htm

Date&Time
2017-01-10 11:00 AM
Location
Room: A303 Meeting Room
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