Magnetic Ground State of an Individual Fe2+ Ion in Strained Semiconductor Nanostructure

Abstract

We investigate spin properties of a Fe2+ dopant, known for having single nondegenerate ground state in bulk host semiconductor. Due to zero magnetic moment such a ground state is of little use for spintronics and solotronics. We show that this well-established picture of Fe2+ spin configuration can be contradicted by subjecting the Fe2+ ion to sufficiently high strain, e.g., resulting from lattice mismatched epitaxial heterostructures. Our analysis reveals that high strain induces qualitative change in the ion energy spectrum and results in doubly degenerate ground state with spin projection Sz=+/-2. An experimental proof of this concept is demonstrated using a new system: an epitaxial quantum dot containing individual Fe2+ ion. Magnetic character of the Fe2+ ground state in a CdSe/ZnSe dot is revealed in photoluminescence experiments by exploiting a coupling between a confined exciton and the single iron impurity.

arXiv commentMain text: 5 pages, 3 figures; Supplemental Material: 3 pages, 1 table, 1 figure

References in corpus (15)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Optical addressing of an individual erbium ion in silicon
• Optical manipulation of a single Mn spin in a CdTe-based quantum dot
• Optical spin orientation of a single manganese atom in a quantum dot
• Optically probing the fine structure of a single Mn atom in an InAs quantum dot
• Designing quantum dots for solotronics
• Observation of strong-coupling effects in a diluted magnetic semiconductor (Ga,Fe)N
• Optical initialization, readout and dynamics of a Mn spin in a quantum dot
• Magnetic anisotropy of singly Mn-doped InAs/GaAs quantum dots
• Optical pumping and non-destructive readout of a single magnetic impurity spin in an InAs/GaAs quantum dot
• Coherent precession of an individual 5/2 spin
• Storage of classical information in quantum spins
• Single exciton spectroscopy of single-Mn doped InAs quantum dots
• Strain induced coherent dynamics of coupled carriers and Mn spins in a quantum dot
• Introducing single Mn2+ ions into spontaneously coupled quantum dot pairs

Cited by in corpus (21)

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• Origin of luminescence quenching in structures containing CdSe/ZnSe quantum dots with a few Mn${}^{2+}$ ions
• Spin dynamics of an individual Cr atom in a semiconductor quantum dot under optical excitation
• Direct determination of zero-field splitting for single Co${}^{2+}$ ion embedded in a CdTe/ZnTe quantum dot
• Resonant optical control of the spin of a single Cr atom in a quantum dot
• Comparison of magneto-optical properties of various excitonic complexes in CdTe and CdSe self-assembled quantum dots
• Influence of non-equilibrium phonons on the spin dynamics of a single Cr atom
• Radio-frequency stress-induced modulation of CdTe/ZnTe quantum dots
• Fine structure of an exciton coupled to a single Fe2+ ion in a CdSe/ZnSe quantum dot
• Optical control of an individual Cr spin in a semiconductor quantum dot
• Coherent dynamics of a single Mn-doped quantum dot revealed by four-wave mixing spectroscopy
• Effect of electron-hole separation on optical properties of individual Cd(Se,Te) Quantum Dots
• Charge fluctuations of a Cr atom probed in the optical spectra of a quantum dot
• Resonant excitation of infra-red emission in GaN:(Mn,Mg)
• Coupling of the triplet states of a negatively charged exciton in a quantum dot with the spin of a magnetic atom
• Single vanadium ion magnetic dopant in an individual CdTe/ZnTe quantum dot
• Deterministic photon storage and readout in a semimagnetic quantum-dot--cavity system doped with a single Mn ion
• Mechanisms of optical orientation of an individual Mn${}^{2+}$ ion spin in a II-VI quantum dot
• Readout of a dopant spin in the anisotropic quantum dot with a single magnetic ion
• Magnetic-field-induced abrupt spin state transition in a quantum dot containing magnetic ions