2006/11/30 by O. Olendski, Tigran V. Shahbazyan, T. V. Shahbazyan
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Anisotropy #Condensed matter physics #Coupling (piping) #Field (mathematics) #Geometry #Magnetic field #Materials science #Optics #Orientation (vector space) #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Spin–orbit interaction #Tilt (camera) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.75.041306
published as Phys. Rev. B 75, 041306(R) (2007) · 7 pages, 3 figures. Extended version of paper published in PRB-RC
openalex publication_date 2007/01/23 · arxiv created 2007/02/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study theoretically phonon-assisted spin relaxation of an electron confined in an elliptical quantum dot (QD) subjected to a tilted magnetic field. In the presence of both Rashba and Dresselhaus spin-orbit terms, the relaxation rate is anisotropic with respect to the in-plane field orientation. This anisotropy originates from the interference, at nonzero tilt angle, between the two spin-orbit terms. We show that, in a narrow range of magnetic field orientations, the relaxation rate exhibits anomalous sensitivity to variations of the QD parameters. In this range, the relative change in the relaxation rate with in-plane field orientation is determined solely by the spin-orbit coupling strengths and by the dot geometry. This allows simultaneous determination of both Rashba and Dresselhaus coupling parameters and the dot ellipticity from analysis of the angular dependence of the relaxation rate.