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

Article

关键词: ELECTRON-SPIN;    SINGLE;   

DOI  :  10.1103/PhysRevB.93.161301

来源: SCIE

【 摘 要 】

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 modeled 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.

【 授权许可】

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