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Double-island Coulomb blockade in (Ga,Mn)As nanoconstrictions

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Geißler, Stefan ; Pfaller, Sebastian ; Utz, Martin ; Bougeard, Dominique ; Donarini, Andrea ; Grifoni, Milena ; Weiss, Dieter
Date of publication of this fulltext: 29 May 2015 13:54


We report on a systematic study of the Coulomb-blockade effects in nanofabricated narrow constrictions in thin (Ga,Mn)As films. Different low-temperature transport regimes have been observed for decreasing constriction sizes: the Ohmic, the single-electron tunneling (SET), and a completely insulating regime. In the SET, complex stability diagrams with nested Coulomb diamonds and anomalous ...


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