Scaling behavior of electron decoherence in a graphene Mach-Zehnder interferometer

M. Jo, June-Young M. Lee, A. Assouline, P. Brasseur, K. Watanabe, T. Taniguchi, P. Roche, D. C. Glattli, N. Kumada, F. D. Parmentier, H. -S. Sim () and P. Roulleau ()
Additional contact information
M. Jo: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay
June-Young M. Lee: Korea Advanced Institute of Science and Technology
A. Assouline: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay
P. Brasseur: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay
K. Watanabe: National Institute for Materials Science
T. Taniguchi: National Institute for Materials Science
P. Roche: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay
D. C. Glattli: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay
N. Kumada: NTT Basic Research Laboratories, NTT Corporation
F. D. Parmentier: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay
H. -S. Sim: Korea Advanced Institute of Science and Technology
P. Roulleau: SPEC, CEA, CNRS, Université Paris-Saclay, CEA Saclay

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Over the past 20 years, many efforts have been made to understand and control decoherence in 2D electron systems. In particular, several types of electronic interferometers have been considered in GaAs heterostructures, in order to protect the interfering electrons from decoherence. Nevertheless, it is now understood that several intrinsic decoherence sources fundamentally limit more advanced quantum manipulations. Here, we show that graphene offers a unique possibility to reach a regime where the decoherence is frozen and to study unexplored regimes of electron interferometry. We probe the decoherence of electron channels in a graphene quantum Hall PN junction, forming a Mach-Zehnder interferometer1,2, and unveil a scaling behavior of decay of the interference visibility with the temperature scaled by the interferometer length. It exhibits a remarkable crossover from an exponential decay at higher temperature to an algebraic decay at lower temperature where almost no decoherence occurs, a regime previously unobserved in GaAs interferometers.

Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-022-33078-2 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:13:y:2022:i:1:d:10.1038_s41467-022-33078-2

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

DOI: 10.1038/s41467-022-33078-2

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 ().