Effects of screening on the two-dimensional electron transport properties in modulation doped heterostructures

Download

index.pdf

Date

1998-06-01

Author

Sen, O
Beşikci, Cengiz
Tanatar, B

Metadata

Show full item record

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

Item Usage Stats

132
views

0
downloads

The effects of screening on the polar optical phonon scattering rates and on the transport properties of the two-dimensional electron gas in AlGaAs/GaAs modulation doped heterostructures have been investigated through Monte Carlo simulations incorporating the three valleys of the conduction band, size quantization in the Gamma valley and the lowest three subbands in the quantum-well. At typical sheet densities observed in modulation doped field-effect transistors, screening considerably affects the electron transport properties under moderately large fields and at low temperatures, by lowering the intrasubband polar-optical phonon scattering rates especially in the first subband. The results show that screening, which is usually ignored in device Monte Carlo simulations, should be included in the simulation in order to be able to predict the device performance correctly.

Subject Keywords

Electrical and Electronic Engineering, Materials Chemistry, Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/35877

Journal

SOLID-STATE ELECTRONICS

DOI

https://doi.org/10.1016/s0038-1101(98)00098-7

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Characteristics of HfO2 and SiO2 on p-type silicon wafers using terahertz spectroscopy Altan, Hakan; Pham, D.; Grebel, H.; Federici, J. F. (IOP Publishing, 2007-05-01) The effect of high-kappa dielectric HfO2 films on 200 mm diameter p-type silicon substrates was investigated and compared with conventional dielectric material, SiO2. We employed all-optical characterization methods using terahertz (THz) time-domain spectroscopy and visible cw pump/THz probe spectroscopy. Measurements were performed on two sets of samples, each set containing both HfO2 and SiO2 coated wafers with varying thickness of oxide layer. One set had a protective coating of either photoresist or Si3...
Effect of lithium doping on the properties of Tl-based superconductors Kayed, TS; Ozkan, H; Hasanlı, Nızamı (IOP Publishing, 2001-09-01) The effects of lithium doping on the formation and properties of the T1-based superconductors have been studied. Lithium atoms up to around 3 mol.% have been added to the oxides of nominal composition Tl1.8Ba2Ca2.2Cu3Ox, and the usual solid-state reaction method has been applied. Lithium additions in the range 0.23-0.29 mol.% increase the fraction of the Tl-2223 phase and significantly improve the critical temperature of the samples. Higher amounts of lithium additions diminish the Tl-2223 phase, reduce the...
Investigation of photovoltaic properties of amorphous InSe thin film based Schottky devices Yilmaz, K.; Parlak, Mehmet; Ercelebi, C. (IOP Publishing, 2007-12-01) In this study, device behavior of amorphous InSe thin films was investigated through I-V, C-V and spectral response measurements onto SnO2/p-InSe/metal Schottky diode structures. Various metal contacts such as Ag, Au, Al, In and C were deposited onto amorphous p-InSe films by the thermal evaporation technique. The best rectifying contact was obtained in a SnO2/p-InSe/Ag Schottky structure from I-V measurements, while the Au contact had poor rectification. Other metal contacts (Al, In and C) showed almost oh...
Effects of anisotropy of ferrite coating on the radiation characteristics of a cylindrical conductor excited by elementary sources Aydın Çivi, Hatice Özlem (Informa UK Limited, 1998-01-01) In this paper, radiation characteristics of an arbitrarily oriented source in an anisotropic multilayered cylindrical structure are investigated by using the state transition matrix approach. Full wave transversal field equations in spectral domain are derived for anisotropic medium in cylindrical coordinates. These expressions are formed into a set of linear first order differential equations. The solution at each layer is expressed in terms of the state transition matrices which are evaluated numerically....
EFFECT OF GAMMA-IRRADIATION AND SILVER DOPING ON YBCO SUPERCONDUCTOR OZKAN, H; ALBISS, BA; HAMDAN, N; MENARD, A (Springer Science and Business Media LLC, 1994-12-01) The effect of gamma-irradiation and silver doping on the properties of YBCO superconductors has been studied by electrical resistance measurements and x-ray diffraction techniques. The zero-resistance superconducting transition temperature of (YBCO)(1-x)Ag-x systematically increase by about 2 K with an increase of Ag content up to x = 0.04. Further increase in Ag content decreases the transition temperature. The normal-state resistance decreases up to a factor of 3.4 with an increase of Ag content. No signi...

Citation Formats

O. Sen, C. Beşikci, and B. Tanatar, “Effects of screening on the two-dimensional electron transport properties in modulation doped heterostructures,” SOLID-STATE ELECTRONICS, pp. 987–991, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35877.