Dielectric function of the two-dimensional electron liquid: An analytical fitting

Date

1996-03-15

Author

Bulutay, C
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

133
views

0
downloads

For electron-electron interactions in two-dimensional electronic systems the technique proposed by Singwi, Tosi, Land, and Sjolander (STLS) has been very promising. In this work, after showing the asymptotic behavior of the STLS local held correction we propose a simple expression for the local-held correction that contains two fitting parameters which are smoothly varying functions of the electronic density. The agreement of the fitting for the pair correlation function is remarkable. It further leads to an expression for the dielectric function which can be useful for applications. Finally, to assess the accuracy of the STLS technique, especially at low electronic densities we compare the STLS results with the available quantum Monte Carlo data.

Subject Keywords

Metallic densities

URI

https://hdl.handle.net/11511/33171

Journal

PHYSICAL REVIEW B

DOI

https://doi.org/10.1103/physrevb.53.7317

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Feedback motion planning of a novel fully actuated unmanned surface vehicle via sequential composition of random elliptical funnels Özdemir, Oğuz; Ankaralı, Mustafa Mert; Department of Electrical and Electronics Engineering (2022-12-27) This thesis proposes and analyzes a motion planning and control schema for unmanned surface vehicles that fuses sampling-based approaches’ probabilistic completeness with closed-loop approaches’ robustness. The Proposed schema is based on the sequential composition of elliptical funnels, and it consists of two stages: tree generation and motion control. For validation of the approach, we carried out experiments using both simulation and physical setup besides the mathematical analysis. In order to have a co...
Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV Khachatryan, V.; et. al. (2010-07-01) Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at root s = 7 TeV are measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield is obtained by counting the number of reconstructed hits, hit pairs, and fully reconstructed charged-particle tracks. The combination of the three methods gives a charged-particle multiplicity per unit of pseudorapidity dN(ch)/d eta vertical bar(vertical bar eta vertical bar<0.5) = 5.78 +/- 0.01(...
Comparison of 3D Versus 4D Path Planning for Unmanned Aerial Vehicles Cicibas, Halil; Demir, Kadir Alpaslan; ARICA, NAFİZ (2016-11-01) This research compares 3D versus 4D (three spatial dimensions and the time dimension) multi-objective and multi-criteria path-planning for unmanned aerial vehicles in complex dynamic environments. In this study, we empirically analyse the performances of 3D and 4D path planning approaches. Using the empirical data, we show that the 4D approach is superior over the 3D approach especially in complex dynamic environments. The research model consisting of flight objectives and criteria is developed based on int...
Investigation of tightly coupled arrays for wideband applications Arda, Kaan; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2020-10) This thesis aims to provide in depth research on tightly coupled dipole arrays to be used in ultrawideband apertures applications. First, operation principles of tightly coupled dipole arrays are investigated. Starting from the Wheeler’s current sheet aperture concept, some calculations on bandwidth and impedance concepts are conducted. B.A. Munk’s addition to the concept, use of capacitive elements between adjacent dipoles, are introduced. Array unit cell is modeled using equivalent circuit approach,...
3D object representation using transform and scale invariant 3D features AKAGÜNDÜZ, Erdem; Ulusoy, İlkay (2007-10-21) An algorithm is proposed for 3D object representation using generic 3D features which are transformation and scale invariant. Descriptive 3D features and their relations are used to construct a graphical model for the object which is later trained and then used for detection purposes. Descriptive 3D features are the fundamental structures which are extracted from the surface of the 3D scanner output. This surface is described by mean and Gaussian curvature values at every data point at various scales and a ...

Citation Formats

C. Bulutay and M. Tomak, “Dielectric function of the two-dimensional electron liquid: An analytical fitting,” PHYSICAL REVIEW B, pp. 7317–7321, 1996, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33171.