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Quantum interference effects in electron transport through Y-branches

Csontos, Dan LU and Xu, Hongqi LU (2002) Proceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21) In 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science
Abstract
Recently, nonlinear properties of three-terminal ballistic junctions (TBJs) were predicted by theoretical calculations done by Xu, and potential applications such as rectification and logic function proposed. In that analysis the TBJ was modeled by connecting three quantum point contacts via a ballistic cavity with adiabatic boundaries, thus neglecting any backscattering of electrons. In this paper we develop a realistic model based on the scattering-matrix method for the calculation of transport through TBJs with arbitrary potential profiles. Temperature-dependent linear and nonlinear transport has been calculated and analyzed for a number of Y-shaped devices with different geometries, sizes, impurity concentrations and various degrees of... (More)
Recently, nonlinear properties of three-terminal ballistic junctions (TBJs) were predicted by theoretical calculations done by Xu, and potential applications such as rectification and logic function proposed. In that analysis the TBJ was modeled by connecting three quantum point contacts via a ballistic cavity with adiabatic boundaries, thus neglecting any backscattering of electrons. In this paper we develop a realistic model based on the scattering-matrix method for the calculation of transport through TBJs with arbitrary potential profiles. Temperature-dependent linear and nonlinear transport has been calculated and analyzed for a number of Y-shaped devices with different geometries, sizes, impurity concentrations and various degrees of boundary roughness. Interference effects are shown to influence the characteristics of the calculated transport in a strong way at low temperature where new quantum phenomena are predicted (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Y-branches, quantum interference effects, nonlinear properties, quantum phenomena, three terminal ballistic junctions, potential applications, rectification, quantum point contacts, logic function, ballistic cavity, adiabatic boundaries, electron backscattering, realistic model, electron transport, scattering matrix method, temperature dependent linear transport, Y-shaped devices, boundary roughness, impurity concentrations
in
7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science
pages
2 pages
publisher
Lund University
conference name
Proceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21)
language
English
LU publication?
yes
id
ede4f9c5-238d-46d7-8ce8-c75d8c08878d (old id 611533)
date added to LUP
2007-11-27 11:41:21
date last changed
2016-04-16 10:22:14
@misc{ede4f9c5-238d-46d7-8ce8-c75d8c08878d,
  abstract     = {Recently, nonlinear properties of three-terminal ballistic junctions (TBJs) were predicted by theoretical calculations done by Xu, and potential applications such as rectification and logic function proposed. In that analysis the TBJ was modeled by connecting three quantum point contacts via a ballistic cavity with adiabatic boundaries, thus neglecting any backscattering of electrons. In this paper we develop a realistic model based on the scattering-matrix method for the calculation of transport through TBJs with arbitrary potential profiles. Temperature-dependent linear and nonlinear transport has been calculated and analyzed for a number of Y-shaped devices with different geometries, sizes, impurity concentrations and various degrees of boundary roughness. Interference effects are shown to influence the characteristics of the calculated transport in a strong way at low temperature where new quantum phenomena are predicted},
  author       = {Csontos, Dan and Xu, Hongqi},
  keyword      = {Y-branches,quantum interference effects,nonlinear properties,quantum phenomena,three terminal ballistic junctions,potential applications,rectification,quantum point contacts,logic function,ballistic cavity,adiabatic boundaries,electron backscattering,realistic model,electron transport,scattering matrix method,temperature dependent linear transport,Y-shaped devices,boundary roughness,impurity concentrations},
  language     = {eng},
  pages        = {2},
  publisher    = {ARRAY(0x7f60240)},
  series       = {7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science},
  title        = {Quantum interference effects in electron transport through Y-branches},
  year         = {2002},
}