A continuum model for dephasing in mesoscopic systems

Date

2011-08-01

Author

Şenozan, Selma
Turgut, Sadi
Tomak, Mehmet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

56
views

0
downloads

A model of continuous dephasing for one-dimensional mesoscopic conductors is proposed. The model is based on Buttiker's fictitious-probe model which is extended by attaching an infinite number of probes uniformly to various points on the conductor. The associated scattering problem is then solved. When the continuum limit is taken, it becomes possible to describe the dephasing as taking place everywhere. The dephasing rate enters into the model as an adjustable parameter. The effect of dephasing on the conductance for a double-barrier system is also studied numerically.

Subject Keywords

Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/42114

Journal

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES

DOI

https://doi.org/10.1016/j.physe.2011.06.025

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

A theoretical study of chemical doping and width effect on zigzag graphene nanoribbons Pekoz, Rengin; Erkoç, Şakir (Elsevier BV, 2009-12-01) The energetics and the electronic properties of nitrogen- and boron-doped graphene nanoribbons with zigzag edges have been investigated using density functional theory calculations. For the optimized geometry configurations, vibrational frequency analysis and wavefunction stability tests have been carried out. Different doping site optimizations for a model nanoribbon have been performed and formation energy values of these sites revealed that zigzag edgesite for both of the dopants were the most favorable ...
A numerically stable algorithm for scattering from several circular cylinders including metamaterials with different boundary conditions SEVER, EMRAH; DİKMEN, FATİH; TUCHKİN, YURY ALEXANDEROVİCH; Sabah, Cumali (Elsevier BV, 2018-01-01) The analytically obtained algebraic equation systems for the TM/TE-z polarized monochromatic waves scattering from eccentrically layered circular cylinders are ill-conditioned for numerical calculations. Therefore, such ill conditioned systems must be regularized for reliable numerical results. Here, the steps of the regularization of the ill conditioned system obtained for the scattered field from a circular metamaterial cylinder includes three parallel circular cylinders: a dielectric, an impedance and a ...
A NEW CLASS OF EMPIRICAL MANY-BODY POTENTIAL-ENERGY FUNCTIONS FOR BULK AND CLUSTER PROPERTIES Erkoç, Şakir (Wiley, 1992-06-01) A new empirical many-body potential energy function (PEF) is proposed, which comprices two- and three-body atomic interactions. The two-body potential is a kind of hybrid function and the three-body potential is formed by additive and nonadditive functions. The additive part is expressed in terms of two-body interactions, and the nonadditive part is expressed as triple-dipole function. The PEF satisfies bulk cohesive energy, bulk stability condition, and bulk modulus. The PEF is parameterized for gold, silv...
Extension of forward-backward method with DFT-based acceleration algorithm for the efficient analysis of large periodic arrays with arbitrary boundaries Aydın Çivi, Hatice Özlem; Chou, HT (Wiley, 2005-11-05) An extension of the discrete Fourier transform (DFT)-based forward-backward algorithm is developed using the virtual-element approach to provide a fast and accurate analysis of electromagnetic radiation/scattering front electrically large, planar, periodic, finite (phased) arrays with arbitrary boundaries. Both the computational complexity and storage requirements of this approach are O(N-tot) (N-tot is the total number of unknowns). The numerical results for both printed and freestanding dipole array's wit...
A NEW EMPIRICAL MANY-BODY POTENTIAL-ENERGY FUNCTION - APPLICATION TO MICROCLUSTERS Erkoç, Şakir (Wiley, 1989-04-01) A new empirical many‐body potential energy function is proposed which comprises two‐ and three‐body interactions. The two‐body potential is a kind of hybrid function and the three‐body potential is expressed in terms of the two‐body interactions. The parameters of the potential energy function can be easily evaluated using dimer data and the bulk cohesive energy of the system considered. The proposed potential energy function is parameterized for several elements in f.c.c., b.c.c., and diamond structures an...

Citation Formats

S. Şenozan, S. Turgut, and M. Tomak, “A continuum model for dephasing in mesoscopic systems,” PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, pp. 1845–1852, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42114.