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arXiv · 1002.2120

Disentangling the effects of spin-orbit and hyperfine interactions on spin blockade

S. Nadj-Perge·S. M. Frolov·J. W. W. van Tilburg·J. Danon·Yu. V. Nazarov·R. Algra·E. P. A. M. Bakkers·L. P. Kouwenhoven
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Abstract

We have achieved the few-electron regime in InAs nanowire double quantum dots. Spin blockade is observed for the first two half-filled orbitals, where the transport cycle is interrupted by forbidden transitions between triplet and singlet states. Partial lifting of spin blockade is explained by spin-orbit and hyperfine mechanisms that enable triplet to singlet transitions. The measurements over a wide range of interdot coupling and tunneling rates to the leads are well reproduced by a simple transport model. This allows us to separate and quantify the contributions of the spin-orbit and hyperfine interactions.

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S. Nadj-Perge, S. M. Frolov, J. W. W. van Tilburg, J. Danon, Yu. V. Nazarov, R. Algra, E. P. A. M. Bakkers, L. P. Kouwenhoven. 2010-02-10. Disentangling the effects of spin-orbit and hyperfine interactions on spin blockade. https://doi.org/10.1103/physrevb.81.201305

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