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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Role of orbital dynamics in spin relaxation and weak antilocalization in quantum dots
Oleg Zaitsev1, Diego Frustaglia, Klaus Richter
1Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany. oleg.zaitsev@physik.uni-regensburg.de
Abstract:
We develop a semiclassical theory for spin-dependent quantum transport to describe weak (anti)localization in quantum dots with spin-orbit coupling. This allows us to distinguish different types of spin relaxation in systems with chaotic, regular, and diffusive orbital classical dynamics. We find, in particular, that for typical Rashba spin-orbit coupling strengths, integrable ballistic systems can exhibit weak localization, while corresponding chaotic systems show weak antilocalization. We further calculate the magnetoconductance and analyze how the weak antilocalization is suppressed with decreasing quantum dot size and increasing additional in-plane magnetic field.
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