– Niels Bohr Institute - University of Copenhagen

Antilocalization of Coulomb Blockade in a Ge-Si Nanowire

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Andrew P. Higginbotham, Ferdinand Kuemmeth, Thorvald Wadum Larsen, M. Fitzpatrick, Jianlong Yao, H. Yan, C. M. Lieber, Charles M. Marcus

The distribution of Coulomb blockade peak heights as a function of magnetic field is investigated experimentally in a Ge-Si nanowire quantum dot. Strong spin-orbit coupling in this hole-gas system leads to antilocalization of Coulomb blockade peaks, consistent with theory. In particular, the peak height distribution has its maximum away from zero at zero magnetic field, with an average that decreases with increasing field. Magnetoconductance in the open-wire regime places a bound on the spin-orbit length ($l_{so}$
Original languageEnglish
Article number216806
JournalPhysical Review Letters
Publication statusPublished - 29 May 2014

Bibliographical note

preprint available at http://arxiv.org/abs/1401.2948

    Research areas

  • cond-mat.mes-hall

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