Infrared Hall conductivity of Na${}_{0.7}$CoO${}_2$

E. J. Choi, S. H. Jung, J. H. Noh +5

We report infrared Hall conductivity ${\sigma }_{xy}(\omega )$ of Na${}_{0.7}$CoO${}_2$ thin films determined from Faraday rotation angle ${\theta }_F$ measurements. ${\sigma }_{xy}(\omega )$ exhibits two types of hole…