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Few electron double quantum dot in an isotopically purified 28Si quantum well

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Wild, A. ; Kierig, Johannes ; Sailer, J. ; Ager, J. W. ; Haller, E. E. ; Abstreiter, Gerhard ; Ludwig, S. ; Bougeard, Dominique
License: Allianz- bzw. Nationallizenz
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Date of publication of this fulltext: 23 Oct 2012 06:32


We present a few electron double quantum dot device defined in an isotopically purified 28Si quantum well (QW). An electron mobility of 5.5·104cm2(Vs)-1 is observed in the QW, which is the highest mobility ever reported for a two-dimensional electron system in 28Si. The residual concentration of 29Si nuclei in the 28Si QW is lower than 103ppm, at the verge where the hyperfine interaction is ...


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