Long-range p-d exchange interaction in a ferromagnet-semiconductor hybrid structure

Abstract

Hybrid structures synthesized from different materials have attracted considerable attention because they may allow not only combination of the functionalities of the individual constituents but also mutual control of their properties. To obtain such a control an interaction between the components needs to be established. For coupling the magnetic properties, an exchange interaction has to be implemented which typically depends on wave function overlap and is therefore short-ranged, so that it may be compromised across the interface. Here we study a hybrid structure consisting of a ferromagnetic Co-layer and a semiconducting CdTe quantum well, separated by a thin (Cd,Mg)Te barrier. In contrast to the expected p-d exchange that decreases exponentially with the wave function overlap of quantum well holes and magnetic Co atoms, we find a long-ranged, robust coupling that does not vary with barrier width up to more than 10 nm. We suggest that the resulting spin polarization of the holes is induced by an effective p-d exchange that is mediated by elliptically polarized phonons.

Main text: 21 pages, 5 figures. Supplementing material: 12 pages, 3 figures

References in corpus (3)

• Spin coherence of a two-dimensional electron gas induced by resonant excitation of trions and excitons in CdTe/(Cd,Mg)Te quantum wells
• Integrating Magnetism into Semiconductor Electronics
• Tunable spin polarization in III-V quantum wells with a ferromagnetic barrier

Cited by in corpus (25)

• Electrically controlled long-distance spin transport through an antiferromagnetic insulator
• An effective magnetic field from optically driven phonons
• Spinodal nanodecomposition in magnetically doped semiconductors
• Orbital magnetic moments of phonons
• Chiral phonons probed by X rays
• Phonon-derived ultrafast relaxation of spin-valley polarized states in MoS_{2}
• Long-Range Phonon Spin Transport in Ferromagnet-Nonmagnetic Insulator Heterostructures
• Unconventional interlayer exchange coupling via chiral phonons in synthetic magnetic oxide heterostructures
• Van der Waals Engineering of Ferromagnetic Semiconductor Heterostructures for Spin and Valleytronics
• Correlated Quantum Phenomena of Spin-Orbit Coupled Perovskite Oxide Heterostructures: Cases of SrRuO3 and SrIrO3-Based Artificial Superlattices
• Excitation of multiple phonon modes in copper metaborate CuB${}_2$O${}_4$ via non-resonant impulsive stimulated Raman scattering
• Voltage control of the long-range p-d exchange coupling in a ferromagnet-semiconductor quantum well hybrid structure
• Electrical Control over Phonon Polarization in Strained Graphene
• Long-range p-d exchange interaction in a ferromagnet-semiconductor Co/CdMgTe/CdTe quantum well hybrid structure
• Exciton-activated effective phonon magnetic moment in monolayer MoS2
• Magnon-exciton proximity coupling at a van der Waals heterointerface
• Phonon Edelstein effect in chiral metals
• Acceleration of the precession frequency for optically-oriented electron spins in ferromagnetic/semiconductor hybrids
• Spin-spin interaction mediated by chiral phonons
• Efficient launch of shear phonons in photostrictive halide perovskites
• Spin dependent charge transfer in MoSe2/hBN/Ni hybrid structures
• Atomic-scale Modulation of Synthetic Magnetic Order in Oxide Superlattices
• Optically induced spin electromotive force in ferromagnetic-semiconductor quantum well structure
• Supercurrent-induced phonon angular momentum
• The temperature-dependent chiral-induced spin selectivity effect: Experiments and theory