Abstract
AbstractWe evaluate resonant tunneling current via series quantum dots with different g ‐factors by Bloch equation method. We found that the resonant current is always singly peaked as a function of bias and its peak position depends on the gate voltage. When the rate of spontaneous phonon emission is very small, the shift of the peak positions between single spin transport and both spin transport corresponds to the half of the difference of the Zeeman energy. In contrast, when the phonon assisted tunneling predominates, the peak always appears at one of the resonant tunneling conditions for larger bias. These features are explained by spin blockade effect. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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