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Quantum interferenc...
Quantum interference effects in electron transport through Y-branches
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- Csontos, Dan (författare)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Xu, Hongqi (författare)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- 2002
- 2002
- Engelska 2 s.
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Ingår i: 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science.
- Relaterad länk:
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https://lup.lub.lu.s...
Abstract
Ämnesord
Stäng
- 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
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- 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
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)