title: Origin of bulk uniaxial anisotropy in zinc-blende dilute magnetic semiconductors.
abstract: It is demonstrated that the nearest-neighbor Mn pair on the GaAs (001) surface has a lower energy for the [110] direction compared to the [110] case. According to the group theory and Luttinger's method of invariants, this specific Mn distribution results in bulk uniaxial in-plane and out-of-plane anisotropies. The sign and magnitude of the corresponding anisotropy energies determined by a perturbation method and ab initio computations are consistent with experimental results.
authors.affiliation: Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Hoża 69, PL-00-681 Warszawa, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Birowska
authors.forename: C
authors.initials: C
authors.lastname: Śliwa
authors.forename: J A
authors.initials: JA
authors.lastname: Majewski
authors.forename: T
authors.initials: T
authors.lastname: Dietl