2011/12/15 by J. P. Hansen, S. A. Sørngård, Morten Førre +3 · 1 citation
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Condensed matter physics #Excited state #Field (mathematics) #Magnetic field #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Singlet state #Spin (aerodynamics) #Spin–orbit interaction #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.85.035326
published as Phys. Rev. B 85, 035326 (2012)
arxiv created 2011/12/15 · openalex publication_date 2012/01/31 · arxiv updated 2012/04/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use numerically exact diagonalization to calculate the spin-orbit- and phonon-induced triplet-singlet relaxation rate in a two-electron quantum dot exposed to a tilted magnetic field. Our scheme includes a three-dimensional description of the quantum dot, the Rashba and the linear and cubic Dresselhaus spin-orbit coupling, the ellipticity of the quantum dot, and a full angular description of the magnetic field. We are able to find reasonable agreement with the experimental results of Meunier et al. [Phys. Rev. Lett. 98, 126601 (2007)] in terms of the singlet-triplet energy splitting and the spin relaxation rate, respectively. We analyze in detail the effects of the spin-orbit factors, magnetic-field angles, and dimensionality and discuss the origins of the remaining deviations from the experimental data.