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Coulomb blockade transport across lateral (Ga,Mn)As nanoconstrictions

Schlapps, Markus; Geissler, Stefan; Lermer, Teresa; Sadowski, Janusz LU ; Wegscheider, Werner and Weiss, Dieter (2010) 18th International Conference on the Electronic Properties of Two-Dimensional Systems ( EP2DS18)/14th International Conference on Modulated Semiconductor Structures ( MSS14) In Physica E-Low-Dimensional Systems & Nanostructures 42(10). p.2676-2680
Abstract
We report on magnetotransport measurements of nanoconstricted (Ga,Mn)As devices showing very large resistance changes that can be controlled by both an electric and a magnetic field. Based on the bias voltage and temperature dependent measurements down to the millikelvin range we compare the models currently used to describe transport through (Ga,Mn)As nanoconstrictions. We provide an explanation for the observed spin-valve like behavior during a magnetic field sweep by means of the magnetization configurations in the device. Furthermore, we prove that Coulomb blockade plays a decisive role for the transport mechanism and show that modeling the constriction as a granular metal describes the temperature and bias dependence of the... (More)
We report on magnetotransport measurements of nanoconstricted (Ga,Mn)As devices showing very large resistance changes that can be controlled by both an electric and a magnetic field. Based on the bias voltage and temperature dependent measurements down to the millikelvin range we compare the models currently used to describe transport through (Ga,Mn)As nanoconstrictions. We provide an explanation for the observed spin-valve like behavior during a magnetic field sweep by means of the magnetization configurations in the device. Furthermore, we prove that Coulomb blockade plays a decisive role for the transport mechanism and show that modeling the constriction as a granular metal describes the temperature and bias dependence of the conductance correctly and allows to estimate the number of participating islands located in the constriction. (C) 2010 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Single electron devices, blockade, Coulomb, Magnetic-semiconductor structures, Nanoscale contacts, Magnetotransport phenomena, Transport and tunneling
in
Physica E-Low-Dimensional Systems & Nanostructures
volume
42
issue
10
pages
2676 - 2680
publisher
Elsevier
conference name
18th International Conference on the Electronic Properties of Two-Dimensional Systems ( EP2DS18)/14th International Conference on Modulated Semiconductor Structures ( MSS14)
external identifiers
  • wos:000284723200051
  • scopus:77957989808
ISSN
1386-9477
DOI
10.1016/j.physe.2009.12.055
language
English
LU publication?
yes
id
56762021-6b02-4a09-bd1f-17afab6ba0cf (old id 1752110)
date added to LUP
2010-12-29 16:32:16
date last changed
2018-05-29 10:52:32
@inproceedings{56762021-6b02-4a09-bd1f-17afab6ba0cf,
  abstract     = {We report on magnetotransport measurements of nanoconstricted (Ga,Mn)As devices showing very large resistance changes that can be controlled by both an electric and a magnetic field. Based on the bias voltage and temperature dependent measurements down to the millikelvin range we compare the models currently used to describe transport through (Ga,Mn)As nanoconstrictions. We provide an explanation for the observed spin-valve like behavior during a magnetic field sweep by means of the magnetization configurations in the device. Furthermore, we prove that Coulomb blockade plays a decisive role for the transport mechanism and show that modeling the constriction as a granular metal describes the temperature and bias dependence of the conductance correctly and allows to estimate the number of participating islands located in the constriction. (C) 2010 Elsevier B.V. All rights reserved.},
  author       = {Schlapps, Markus and Geissler, Stefan and Lermer, Teresa and Sadowski, Janusz and Wegscheider, Werner and Weiss, Dieter},
  booktitle    = {Physica E-Low-Dimensional Systems & Nanostructures},
  issn         = {1386-9477},
  keyword      = {Single electron devices,blockade,Coulomb,Magnetic-semiconductor structures,Nanoscale contacts,Magnetotransport phenomena,Transport and tunneling},
  language     = {eng},
  number       = {10},
  pages        = {2676--2680},
  publisher    = {Elsevier},
  title        = {Coulomb blockade transport across lateral (Ga,Mn)As nanoconstrictions},
  url          = {http://dx.doi.org/10.1016/j.physe.2009.12.055},
  volume       = {42},
  year         = {2010},
}