Antilocalization of Coulomb Blockade in a Ge/Si Nanowire

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Antilocalization of Coulomb Blockade in a Ge/Si Nanowire

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Title: Antilocalization of Coulomb Blockade in a Ge/Si Nanowire
Author: Higginbotham, A ORCID  0000-0001-5211-9933 ; Kuemmeth, F; Larsen, T. W.; Fitzpatrick, M.; Yao, Jun; Yan, H.; Lieber, Charles M.; Marcus, C

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Citation: Higginbotham, A. P., F. Kuemmeth, T. W. Larsen, M. Fitzpatrick, J. Yao, H. Yan, C. M. Lieber, and C. M. Marcus. 2014. “Antilocalization of Coulomb Blockade in a Ge/Si Nanowire.” Physical Review Letters 112 (21) (May 29). doi:10.1103/physrevlett.112.216806.
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Abstract: 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 (lso < 20 nm), consistent with values extracted in the Coulomb blockade regime (lso < 25 nm).
Published Version: 10.1103/physrevlett.112.216806
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