Pauli spin blockade in cotunneling transport through a double quantum dot

Abstract

We study spin correlation in a double quantum dot containing a few electrons in each dot (around 10). Clear current rectification with negative differential conductance is observed in the cotunneling regime, which is well explained by a Pauli spin blockade. The current feature is discussed in connection with exchange singlet-triplet splitting based on two simple models, one of which takes coherent interdot coupling and the other incoherent interdot coupling into account.

11 pages, 4 figures

References in corpus (2)

• Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
• Singlet-triplet spin blockade and charge sensing in a few-electron double quantum dot

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