Screening in two-dimensional electron liquid

Bulutay, C
Gunalp, N
Tomak, Mehmet


Screening effect on the binding energies of shallow donors, acceptors and excitons in finite-barrier quantum wells
Akbas, H; Aktas, S; Okan, SE; Ulas, M; Tomak, Mehmet (Elsevier BV, 1998-01-01)
The conduction and valence subband energies in the presence of an electric field are calculated using the fifth-order Runge-Kutta method. The binding energies of shallow donors, accepters and excitons in finite-barrier GaAs/Ga1-xAlx As quantum wells are then obtained variationally in the presence of a magnetic field. The effects of a spatially dependent screening function epsilon(r) On the calculation of binding energies are specifically investigated. The use of epsilon(r) in comparison with the use of a co...
Screening and characterization of catalytic composite membranes for ethyllactate production
Oğuzer, Özge; Karakaş, Gürkan; Department of Chemical Engineering (2004)
In this research, molybdophosphoric acid (PMo) was blended with polysulfone polymer (PSF) and form a film catalyst by using a common solvent dimethylformamide (DMF). Kinetic and mass transfer parameters were evaluated for catalytic films in ethanol lactic acid esterification reaction as film surface area, film thickness and catalyst loading were varied at 50?C, 1 atm and 1:1 ethyl alcohol to lactic acid mole ratio conditions. Also prepared films were characterized by DSC, TGA, FTIR, X-ray and SEM analysis. ...
Charging/discharging of thin PS/PMMA films as probed by dynamic X-ray photoelectron spectroscopy
Sezen, Hikmet; Ertaş, Gülay; Dana, Aykutlu; Suzer, Sefik (American Chemical Society (ACS), 2007-06-12)
Eken, Aykut (2014-04-25)
Functional Near Infrared Spectroscopy is used in neuroimaging studies to observe the oxyhemoglobin (HB02) and deoxyhemoglobin (HB) changes. Blood oxygen level dependency (BOLD) signal that is collected by using this system shows response in related region in brain against an applied stimulus. Therefore in these signals, signal to noise ratio (SNR) is quite important to decide the behavior of brain in related region In this study, fNIRS data was filtered by using eigenvalue based methods such as Principal Co...
Processing by electrospinning method and characterization of poly(lactic acid) and poly(lactic acid)-based composite nanofibers
Aşcı, Emine Ümran; Bayram, Göknur; Department of Chemical Engineering (2022-6)
Electrospinning method is a versatile, cost-effective and viable technique to produce nanofibers with high ratios of surface area to the volume. The ability to obtain characteristics of the nanofibers via electrospinning, i.e., small pore size, high porosity and surface area/volume ratio, are some of the significant reasons why this method has eventually become a widespread technique for developing continuous and long fibers with nanometer-scale diameters. Furthermore, these advantages enable the produced n...
Citation Formats
C. Bulutay, N. Gunalp, and M. Tomak, “Screening in two-dimensional electron liquid,” 1995, vol. 328, Accessed: 00, 2020. [Online]. Available: