Single electron interference and capacitive edge mode coupling generates ϕ₀/2 flux periodicity in Fabry-Perot interferometers.

ABSTRACT: Experimental observations of flux periodicity ϕ₀/2, where ϕ₀ = h/e, for interference of the outermost edge mode in the integer quantum Hall regime have been attributed to an exotic electron pairing mechanism. We present measurements of an AlGaAs/GaAs Fabry-Pérot interferometer operated in the integer quantum Hall regime for filling factors 1 ≤ ν ≤ 3 that has been designed to simultaneously express measurable bulk-edge and edge-edge couplings. At integer fillings ν = 2 and ν = 3, we observe interference with flux periodicity ϕ₀/2 for the outermost edge mode. Our analysis indicates that the periodicity ϕ₀/2 is not driven by electron pairing but is the result of capacitive coupling between isolated edge modes and the interfering outer edge. The inte

SUBMITTER: Liang S 

PROVIDER: S-EPMC12356859 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature