Individual Cr atom in a semiconductor quantum dot: optical addressability and spin-strain coupling

Abstract

We demonstrate the optical addressability of the spin of an individual Chromium atom (Cr) embedded in a semiconductor quantum dot. The emission of Cr-doped quantum dots and their evolution in magnetic field reveal a large magnetic anisotropy of the Cr spin induced by local strain. This results in the zero field splitting of the 0, +-1 and +-2 Cr spin states and in a thermalization on the magnetic ground states 0 and +-1. The observed strong spin to strain coupling of Cr is of particular interest for the development of hybrid spin-mechanical devices where coherent mechanical driving of an individual spin in an oscillator is needed. The magneto-optical properties of Cr-doped quantum dots are modelled by a spin Hamiltonian including the sensitivity of the Cr spin to the strain and the influence of the quantum dot symmetry on the carrier-Cr spin coupling.

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Cited by in corpus (16)

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• Resonant optical control of the spin of a single Cr atom in a quantum dot
• Influence of non-equilibrium phonons on the spin dynamics of a single Cr atom
• Radio-frequency stress-induced modulation of CdTe/ZnTe quantum dots
• Optical control of an individual Cr spin in a semiconductor quantum dot
• Fine structure of an exciton coupled to a single Fe2+ ion in a CdSe/ZnSe quantum dot
• Coherent dynamics of a single Mn-doped quantum dot revealed by four-wave mixing spectroscopy
• Charge fluctuations of a Cr atom probed in the optical spectra of a quantum dot
• 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
• Spin dynamics of positively charged excitons in Cr${}^{+}$-doped quantum dots probed by resonant photoluminescence
• Mechanisms of optical orientation of an individual Mn${}^{2+}$ ion spin in a II-VI quantum dot
• Magnetic-field-induced abrupt spin state transition in a quantum dot containing magnetic ions
• Readout of a dopant spin in the anisotropic quantum dot with a single magnetic ion