Non-universal transmission phase behaviour of a large quantum dot

Hermann Edlbauer, Shintaro Takada, Grégoire Roussely, Michihisa Yamamoto, Seigo Tarucha, Arne Ludwig, Andreas D. Wieck, Tristan Meunier and Christopher Bäuerle ()
Additional contact information
Hermann Edlbauer: Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel
Shintaro Takada: Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel
Grégoire Roussely: Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel
Michihisa Yamamoto: University of Tokyo
Seigo Tarucha: University of Tokyo
Arne Ludwig: Ruhr-Universität Bochum
Andreas D. Wieck: Ruhr-Universität Bochum
Tristan Meunier: Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel
Christopher Bäuerle: Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract The electron wave function experiences a phase modification at coherent transmission through a quantum dot. This transmission phase undergoes a characteristic shift of π when scanning through a Coulomb blockade resonance. Between successive resonances either a transmission phase lapse of π or a phase plateau is theoretically expected to occur depending on the parity of quantum dot states. Despite considerable experimental effort, this transmission phase behaviour has remained elusive for a large quantum dot. Here we report on transmission phase measurements across such a large quantum dot hosting hundreds of electrons. Scanning the transmission phase along 14 successive resonances with an original two-path interferometer, we observe both phase lapses and plateaus. We demonstrate that quantum dot deformation alters the sequence of phase lapses and plateaus via parity modifications of the involved quantum dot states. Our findings set a milestone towards an comprehensive understanding of the transmission phase of quantum dots.

Date: 2017
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-017-01685-z Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01685-z

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-017-01685-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().