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説明:

Quantum Hall Fabry-Pérot interferometers are sensitive to the properties of bulk quasiparticles enclosed by the interferometer loop, with the interference phase containing information about both the quasiparticle statistics and the Coulomb-mediated bulk-edge coupling. Previous studies have explored the role of the bulk-edge coupling in an equilibrium picture where quasiparticles enter and exit the interferometer rapidly compared to the timescale over which the interferometer phase is measured. Here, we present data from a monolayer graphene quantum Hall interferometer in the integer quantum Hall regime at 𝜈=−1 and 𝜈=−2. Quantum interference shows phase slips associated with the entrance of quasiparticles to the interferometer bulk. Tracing the dependence of these phase slips on the magnetic field, we show that the equilibration time can become as long as several minutes. We further use our multigated geometry to identify two classes of phase slips. The first is associated with the addition of a quasiparticle to a bulk “puddle” of quasiparticles uniformly coupled to the entire chiral edge state, while the second is associated with the addition of a quasiparticle trapped by a defect site that couples predominantly to the closest portion of the edge.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Quantum Hall interferometer, Quasiparticle, Graphene

刊行年月日: 2025-06-25

出版者: American Physical Society (APS)

掲載誌:

• Physical Review Letters (ISSN: 10797114) vol. 134 issue. 25 256301

研究助成金:

• Office of Naval Research N00014-23-1-2066
• Air Force Office of Scientific Research FA9560-20-1-0208
• Army Research Office W911NF20-1-0082
• U.S. Department of Energy DEAC02-05-CH11231
• Japan Society for the Promotion of Science 19H05790
• Japan Society for the Promotion of Science 20H00354
• Japan Society for the Promotion of Science 21H05233
• Materials Sciences and Engineering Division
• Basic Energy Sciences
• Office of Science
• Brown Investigator Award

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1103/kqct-3llf

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更新時刻: 2026-07-28 11:22:43 +0900

MDRでの公開時刻: 2026-07-28 14:26:09 +0900