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

Nilsson, Henrik LU ; Caroff, Philippe LU ; Thelander, Claes LU ; Larsson, Marcus LU ; Wagner, Jakob LU ; Wernersson, Lars-Erik LU ; Samuelson, Lars LU and Xu, Hongqi LU (2009) In Nano Letters 9(9). p.3151-3156
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
9
issue
9
pages
3151 - 3156
publisher
The American Chemical Society
external identifiers
  • wos:000269654900012
  • pmid:19736971
  • scopus:70349964624
ISSN
1530-6992
DOI
10.1021/nl901333a
language
English
LU publication?
yes
id
a9fb4af4-cf58-4940-9a3c-68934bb11590 (old id 1483650)
date added to LUP
2009-10-08 12:44:07
date last changed
2017-11-19 03:41:38
@article{a9fb4af4-cf58-4940-9a3c-68934bb11590,
  abstract     = {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.},
  author       = {Nilsson, Henrik and Caroff, Philippe and Thelander, Claes and Larsson, Marcus and Wagner, Jakob and Wernersson, Lars-Erik and Samuelson, Lars and Xu, Hongqi},
  issn         = {1530-6992},
  language     = {eng},
  number       = {9},
  pages        = {3151--3156},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Giant, level-dependent g factors in InSb nanowire quantum dots.},
  url          = {http://dx.doi.org/10.1021/nl901333a},
  volume       = {9},
  year         = {2009},
}