Spin fluctuations and magnetic polaron formation in dilute magnetic semiconductor Quantum Well structures.
01 January 1988
Previous work (1) has shown that, in the presence of sp-d exchange between carriers and localized spins in a dilute magnetic semiconductor (DMS), spin fluctuations can give rise to an exchange induced pair interaction between an electron and hole making up an exciton complex, leading to the formation of an excitonic magnetic polaron (i.e. magnetically stabilized state). This is in contrast to earlier magnetic polaron treatments which have not explicitly considered fluctuations of the localized spins, but rather only diagonally terms(2) in the exchange interactions of fluctuations of the average magnetization.(3)