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Field-orientation dependence of the Zeeman spin splitting in (In,Ga)As quantum point contacts

Martin, T. P.; Szorkovszky, A.; Micolich, A. P.; Hamilton, A. R.; Marlow, C. A.; Taylor, R. P.; Linke, Heiner LU and Xu, Hongqi LU (2010) In Physical Review B (Condensed Matter and Materials Physics) 81(4).
Abstract
We study the Zeeman spin splitting in a quantum point contact (QPC) etched into an InGaAs/InP heterostructure for three orthogonal magnetic field orientations with respect to the QPC. For the two in-plane orientations we observe an isotropic Zeeman spin splitting, which becomes stronger as the system is made more one dimensional. The Lande g factor is enhanced by up to a factor of two compared to two-dimensional electron systems in InGaAs/InP. A much larger Zeeman splitting is observed when the field is oriented perpendicular to the heterostructure, resulting in a g factor of 15.7 in the one-dimensional limit.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
81
issue
4
publisher
American Physical Society
external identifiers
  • wos:000274002500009
  • scopus:77954829460
ISSN
1098-0121
DOI
10.1103/PhysRevB.81.041303
language
English
LU publication?
yes
id
d2f338ff-ad30-484d-bf89-3033cd11fb71 (old id 1546899)
date added to LUP
2010-02-25 10:53:26
date last changed
2018-06-10 04:10:31
@article{d2f338ff-ad30-484d-bf89-3033cd11fb71,
  abstract     = {We study the Zeeman spin splitting in a quantum point contact (QPC) etched into an InGaAs/InP heterostructure for three orthogonal magnetic field orientations with respect to the QPC. For the two in-plane orientations we observe an isotropic Zeeman spin splitting, which becomes stronger as the system is made more one dimensional. The Lande g factor is enhanced by up to a factor of two compared to two-dimensional electron systems in InGaAs/InP. A much larger Zeeman splitting is observed when the field is oriented perpendicular to the heterostructure, resulting in a g factor of 15.7 in the one-dimensional limit.},
  articleno    = {041303},
  author       = {Martin, T. P. and Szorkovszky, A. and Micolich, A. P. and Hamilton, A. R. and Marlow, C. A. and Taylor, R. P. and Linke, Heiner and Xu, Hongqi},
  issn         = {1098-0121},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Field-orientation dependence of the Zeeman spin splitting in (In,Ga)As quantum point contacts},
  url          = {http://dx.doi.org/10.1103/PhysRevB.81.041303},
  volume       = {81},
  year         = {2010},
}