Antilocalization of Coulomb Blockade in a Ge/Si Nanowire

2014/01/13 by A. P. Higginbotham, Andrew Higginbotham, F. Kuemmeth +11 · 59 citations
Engineering · Medicine · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Blockade #Condensed matter physics #Coulomb #Coulomb blockade #Electron #Materials science #Medicine #Nanowire #Nanowire Synthesis and Applications #Physics #Quantum mechanics #Semiconductor Quantum Structures and Devices #Transistor #Voltage #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.112.216806

published in Physical Review Letters 112(21) (American Physical Society) · Supplementary Information available at http://bit.ly/19pMpdd

arxiv created 2014/01/13 · openalex publication_date 2014/05/29 · arxiv updated 2014/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

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 (l_so<20 nm), consistent with values extracted in the Coulomb blockade regime (l_so<25 nm).

Citations

• A Ge/Si heterostructure nanowire-based double quantum dot with integrated charge sensor
• One-dimensional hole gas in germanium/silicon nanowire heterostructures
• Impurity Effect on Weak Antilocalization in the Topological InsulatorBi2Te3
• Spintronics: Fundamentals and applications
• Changing the Electronic Spectrum of a Quantum Dot by Adding Electrons
• Helical Liquids and Majorana Bound States in Quantum Wires
• Quantum effects in Coulomb blockade
• Spin-Orbit Interaction and Magnetoresistance in the Two Dimensional Random System

Cited by

• The germanium quantum information route
• Strong spin-orbit interaction and g-factor renormalization of hole spins in Ge/Si nanowire quantum dots