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Fractional quantization of the ballistic conductance in electron and hole systems

In the present article we give a brief overview of the theories of the 0.7 anomaly of the ballistic conductance. The special attantion is given to the concept of a fractional quantization of the ballistic conductance arising from exchange interaction of the Heisenberg type between the carrier localized in the region of the quantum point contact and freely propagating carriers in electron and hole systems. ----- Brotaskömmtun skotleiðninnar í einvíðum rafeinda og holukerfum Í grein þessari verður skömmtun skotleiðninnar í einvíðum kerfum útskýrð og farið yfir nýjustu og helstu fræðilíkön á sviði \LDQ 0,7 fráviksins \RDQ og tengdra fyrirbrigða í einvíðum rafeinda og holukerfum. Við kynnum hugmynd okkar um að brotaskömmtun skotleiðninnar leiði af Heisenberg skiptaverkun milli staðbundins rafbera í skammtapunktsnertunni og frjálsra leiðnirafbera og sýnum fram á að hegðun leiðninnar er eigindlega ólík milli rafeinda og holukerfa.

preprint2010arXivOpen access

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