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$h/2e$--Oscillations for Correlated Electron Pairs in Disordered Mesoscopic Rings

D. Weinmann·A. Mueller-Groeling·J. -L. Pichard·K. Frahm
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Abstract

The full spectrum of two interacting electrons in a disordered mesoscopic one--dimensional ring threaded by a magnetic flux is calculated numerically. For ring sizes far exceeding the one--particle localization length $L_1$ we find several $h/2e$--periodic states whose eigenfunctions exhibit a pairing effect. This represents the first direct observation of interaction--assisted coherent pair propagation, the pair being delocalized on the scale of the whole ring.

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D. Weinmann, A. Mueller-Groeling, J. -L. Pichard, K. Frahm. 1995-03-21. $h/2e$--Oscillations for Correlated Electron Pairs in Disordered Mesoscopic Rings. https://doi.org/10.1103/physrevlett.75.1598

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