title: Carrier-induced magnetic ordering control in a digital (Ga,Mn)as structure.
abstract: With the full potential linearized augmented plane method, we theoretically investigated the carrier-induced magnetization reversal in digital (Ga,Mn)As heterostructures with varying distance between the two Mn layers along with the distribution and concentration of external carriers. The presence of external holes induces switching from the antiferromagnetic to ferromagnetic state when d(Mn-Mn)=16.96 A, whereas the addition of electrons produces no significant effect. We demonstrate a possibility to separately control T(c) and magnetic reversal in digital (Ga,MN)As alloys.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Jisang
authors.initials: J
authors.lastname: Hong
authors.forename: Ding-Sheng
authors.initials: DS
authors.lastname: Wang
authors.forename: R Q
authors.initials: RQ
authors.lastname: Wu