Band tails and the insulator-metal transition in the persistent photoconductor Cd_1-xMn_xTe:In

Persistent photoconductivity has been demonstrated in the dilute magnetic semiconductor Cd1-xMnxTe and has been used to elucidate the shape of the band tail. It is further shown that the insulator-metal transition may be approached, in one sample, by controlling the persistent carrier density with illumination. © 1992.