Experimental observation of persistent currents in GaAs-AlGaAs single loop
D. MaillyCentre de Recherches sur les très Basses Températures, Centre National de la Recherche Scientifique, 25 av des Martyrs, 38042 Grenoble, FranceC. ChapelierCentre de Recherches sur les très Basses Températures, Centre National de la Recherche Scientifique, 25 av des Martyrs, 38042 Grenoble, FranceA. Benoı̂tCentre de Recherches sur les très Basses Températures, Centre National de la Recherche Scientifique, 25 av des Martyrs, 38042 Grenoble, France
1993en
ABI
Аннотация
We report measurements of the magnetic response of a GaAlAs/GaAs mesoscopic ring. We have developed a dedicated SQUID technique where sample and SQUID are on the same chip. We have detected a periodic signal, with a period h/e, which is the signature of a persistent current with an amplitude 4\ifmmode\pm\else\textpm\fi{}2 nA, in good agreement with current theories.
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