Spin separation in digital ferromagnetic heterostructures

Abstract

In a study of the ferromagnetic phase of a multilayer digital ferromagnetic semiconductor in the mean-field and effective-mass approximations, we find the exchange interaction to have the dominant energy scale of the problem, effectively controlling the spatial distribution of the carrier spins in the digital ferromagnetic heterostructures. In the ferromagnetic phase, the majority and minority carriers tend to be in different regions of the space (spin separation). Hence, the charge distribution of carriers also changes noticeably from the ferromagnetic to the paramagnetic phase. An example of a design to exploit these phenomena is given.

4 pages, 3 figures. Submitted to Phys. Rev. B

References in corpus (3)

• A theory of ferromagnetism in planar heterostructures of (Mn,III)-V semiconductors
• Ab-initio transport theory for digital ferromagnetic heterostructures
• Spin-polarized transport in GaMnAs multilayers

Cited by in corpus (7)

• Theory of ferromagnetic (III,Mn)V semiconductors
• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Semiconductor Spintronics
• Ferromagnetism mediated by few electrons in a semimagnetic quantum dot
• Single exciton spectroscopy of semimagnetic quantum dots
• Self-sustained magnetoelectric oscillations in magnetic resonant tunneling structures
• Modulation of the Curie Temperature in Ferromagnetic/Ferroelectric Hybrid Double Quantum Wells