Single, double, and triple quantum dots in Ge/Si nanowires

F.N.M. Froning, M.K. Rehmann, Joost Ridderbos, Floris Arnoud Zwanenburg, Ang Li, Erik P.A.M. Bakkers, D.M. Zumbuhl, F.R. Braakma (Corresponding Author)

    Research output: Contribution to journalArticleAcademicpeer-review

    17 Citations (Scopus)
    28 Downloads (Pure)

    Abstract

    We report highly tunable control of holes in Ge/Si core/shell nanowires. We demonstrate the ability to create single quantum dots of various sizes, with low hole occupation numbers and clearly observable excited states. For the smallest dot size, we observe indications of single-hole occupation. Moreover, we create double and triple tunnel-coupled quantum dot arrays. In the double quantum dot configuration, we observe Pauli spin blockade. These results open the way to perform hole spin qubit experiments in these devices.
    Original languageEnglish
    Article number073102
    Number of pages5
    JournalApplied physics letters
    Volume113
    Issue number7
    DOIs
    Publication statusPublished - 15 Aug 2018

    Keywords

    • Nanocrystals, nanowires, core/shell nanowires, coupled quantum dots, double quantum dots, occupation numbers, single quantum dot, spin blockade, triple quatum, tunable control

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