Spin detection in quantum dots by electric currents
Eugene G. Mishchenko, Arne Brataas, and Yaroslav Tserkovnyak
TL;DR
This paper presents a theoretical framework for detecting spin polarization and spin-flip processes in quantum dots by analyzing electric currents, admittance, and shot noise influenced by spin dynamics.
Contribution
It introduces a comprehensive rate equation model that incorporates spin accumulation, interactions, and fluctuations to analyze transport properties in spin-polarized quantum dots.
Findings
Spin-flip scattering governs ac response and shot noise.
Detection of spin polarization is possible via frequency-dependent measurements.
The model links spin dynamics to measurable electrical signals.
Abstract
We develop a theoretical description of transport through quantum dots connected to reservoirs via spin-polarized ballistic contacts. Rate equations account for spin accumulation inside the dot, electron-electron interactions, and stochastic fluctuations. It is shown that both the ac response (admittance) and the frequency-dependent shot noise are governed by spin-flip scattering, which can be used to detect spin polarization and spin-flip processes in the dot.
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