skip to main content

SciTech ConnectSciTech Connect

Title: Spin-flip relaxation via optical phonon scattering in quantum dots

Based on the spin-orbit coupling admixture mechanism, we theoretically investigate the spin-flip relaxation via optical phonon scattering in quantum dots by considering the effect of lattice relaxation due to the electron-acoustic phonon deformation potential coupling. The relaxation rate displays a cusp-like structure (or a spin hot spot) that becomes more clearly with increasing temperature. We also calculate the relaxation rate of the spin-conserving process, which follows a Gaussian form and is several orders of magnitude larger than that of spin-flip process. Moreover, we find that the relaxation rate displays the oscillatory behavior due to the interplay effects between the magnetic and spatial confinement for the spin-flip process not for the spin-conserving process. The trends of increasing and decreasing temperature dependence of the relaxation rates for two relaxation processes are obtained in the present model.
Authors:
 [1] ;  [2] ;  [3]
  1. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, Tianjin University, Tianjin 300072 (China)
  2. Suzhou Institute of Nano-tech and Nano-bionics, CAS, Suzhou 215125 (China)
  3. Institute of Semiconductor, CAS, Beijing 100083 (China)
Publication Date:
OSTI Identifier:
22266166
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFINEMENT; CUSPED GEOMETRIES; DEFORMATION; HOT SPOTS; L-S COUPLING; PHONONS; QUANTUM DOTS; RELAXATION; SCATTERING; SPIN; SPIN FLIP; TEMPERATURE DEPENDENCE