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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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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 (ACS)
external identifiers
  • wos:000269654900012
  • pmid:19736971
  • scopus:70349964624
  • pmid:19736971
ISSN
1530-6992
DOI
10.1021/nl901333a
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Solid State Physics (011013006), Polymer and Materials Chemistry (LTH) (011001041), Electrical and information technology (011041010)
id
a9fb4af4-cf58-4940-9a3c-68934bb11590 (old id 1483650)
date added to LUP
2016-04-01 12:57:15
date last changed
2022-04-21 18:55:16
@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 (ACS)}},
  series       = {{Nano Letters}},
  title        = {{Giant, level-dependent g factors in InSb nanowire quantum dots.}},
  url          = {{http://dx.doi.org/10.1021/nl901333a}},
  doi          = {{10.1021/nl901333a}},
  volume       = {{9}},
  year         = {{2009}},
}