Impurity Band Conduction in a High Temperature Ferromagnetic Semiconductor

K. S. Burch, D. B. Shrekenhamer, E. J. Singley +7

The band structure of a prototypical dilute ferromagnetic semiconductor, Ga${}_{1-x}$Mn${}_x$As, is studied across the phase diagram via optical spectroscopy. We prove that the Fermi…