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Giant, level-dependent g factors in InSb nanowire quantum dots.

In English

Författare

Summary, in English

We report on magnetotransport measurements on InSb nanowire quantum dots. The measurements show that the quantum levels of the InSb quantum dots have giant g factors, with absolute values up to approximately 70, the largest value ever reported for semiconductor quantum dots. We also observe that the values of these g factors are quantum level dependent and can differ strongly between different quantum levels. The presence of giant g factors indicates that considerable contributions from the orbital motion of electrons are preserved in the measured InSb nanowire quantum dots, while the level-to-level fluctuations arise from spin-orbit interaction. We have deduced a value of Delta(SO) = 280 mueV for the strength of spin-orbit interaction from an avoided level crossing between the ground state and first excited state of an InSb nanowire quantum dot with a fixed number of electrons.

Publiceringsår

2009

Språk

Engelska

Sidor

3151-3156

Publikation/Tidskrift/Serie

Nano Letters

Volym

9

Issue

9

Dokumenttyp

Artikel i tidskrift

Förlag

The American Chemical Society (ACS)

Ämne

  • Nano Technology

Status

Published

Forskningsgrupp

  • Nano

ISBN/ISSN/Övrigt

  • ISSN: 1530-6992