Confined acoustic phonon-mediated spin relaxation in a twodimensional quantum dot in the presence of perpendicular magnetic field

19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures

Vardanyan, K.A.^1 ; Vartanian, A.L.^1 ; Stepanyan, A.G.^1 ; Kirakosyan, A.A.^1

Department of Solid State Physics, Yerevan State University, A.Manoogian, Yerevan

0025, Armenia^1

关键词: Acoustic-phonon scattering;    Confined acoustic phonons;    Electron coupling;    Electron Hamiltonian;    Exact diagonalization;    Perpendicular magnetic fields;    Spin relaxation time;    Spin-orbit couplings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/647/1/012043/pdf
DOI  :  10.1088/1742-6596/647/1/012043

来源: IOP

【 摘 要 】

The spin-relaxation time due to the electron-acoustic phonon scattering in GaAs quantum dots is studied after the exact diagonalization of the electron Hamiltonian with the spin-orbit coupling. It has been shown that in comparison with flexural phonons, the electron coupling with the dilatational phonons causes 3 orders faster spin relaxation. We have found that the relaxation rate of the spin-flip is an order of magnitude smaller than that of the spin- conserving.