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Spin orbit effects in a GaAs quantum dot in a parallel magnetic field

B. I. Halperin·Ady Stern·Y. Oreg·J. H. Cremers·J. Folk·C. M. Marcus
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Abstract

We analyze the effects of spin-orbit coupling on fluctuations of the conductance of a quantum dot fabricated in a GaAs heterostructure. We argue that spin-orbit effects may become important in the presence of a large parallel magnetic field B_{||}, even if they are negligble for B_{||}=0. This should be manifest in the level repulsion of a closed dot, and in reduced conductance fluctuations in dots with a small number of open channels in each lead, for large B_{||}. Our picture is consistent with the experimental observations of Folk et al.

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B. I. Halperin, Ady Stern, Y. Oreg, J. H. Cremers, J. Folk, C. M. Marcus. 2000-10-04. Spin orbit effects in a GaAs quantum dot in a parallel magnetic field. https://doi.org/10.1103/physrevlett.86.2106

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