Role of electron–electron collisions in high field conduction in Nitrides

2015 ◽  
Vol 466-467 ◽  
pp. 107-111 ◽  
Author(s):  
V.V. Paranjape
Keyword(s):  
High Field ◽  
Electron Collisions

Transport and fluctuations in nonlinear-dissipative systems: role of interparticle collisions

1999 ◽  
Vol 4 ◽  
pp. 31-86 ◽  
Author(s):  
R. Katilius ◽  
A. Matulionis ◽  
R. Raguotis ◽  
I. Matulionienė
Keyword(s):  
Electric Fields ◽  
Carrier Density ◽  
Experimental Results ◽  
Dissipative Systems ◽  
Doped Semiconductors ◽  
Electron Diffusion ◽  
Electron Collisions ◽  
Electric Noise ◽  
Diffusion Phenomena

The goal of the paper is to overview contemporary theoretical and experimental research of the microwave electric noise and fluctuations of hot carriers in semiconductors, revealing sensitivity of the noise spectra to non-linearity in the applied electric field strength and, especially, in the carrier density. During the last years, investigation of electronic noise and electron diffusion phenomena in doped semiconductors was in a rapid progress. By combining analytic and Monte Carlo methods as well as the available experimental results on noise, it became possible to obtain the electron diffusion coefficients in the range of electric fields where inter-electron collisions are important and Price’s relation is not necessarily valid. Correspondingly, a special attention to the role of inter-electron collisions and of the non-linearity in the carrier density while shaping electric noise and diffusion phenomena in the non-equilibrium states will be paid. The basic and up-to-date information will be presented on methods and advances in this contemporary field - the field in which methods of non-linear analytic and computational analysis are indispensable while seeking coherent understanding and interpretation of experimental results.

Role of high-field MR in studies of localized prostate cancer

2013 ◽  
Vol 27 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Miriam W. Lagemaat ◽  
Tom W. J. Scheenen
Keyword(s):  
Prostate Cancer ◽  
High Field ◽  
Localized Prostate Cancer ◽  
High Field Mr

Role of screening, heating, and dielectrics on high-field transport in graphene

2012 ◽  
Author(s):  
Andrey Y. Serov ◽  
Zhun-Yong Ong ◽  
Vincent E. Dorgan ◽  
Eric Pop
Keyword(s):  
High Field

The role of N-acetylcysteine in protecting synovial fluid biomolecules against radiolytically-mediated oxidative damage: A high field proton NMR study

1999 ◽  
Vol 30 (5) ◽  
pp. 351-369 ◽  
Author(s):  
Martin Grootveld ◽  
Christopher J.L. Silwood ◽  
Edward J. Lynch ◽  
Ismail Y. Patel ◽  
David R. Blake
Keyword(s):  
Synovial Fluid ◽  
Oxidative Damage ◽  
High Field ◽  
Proton Nmr ◽  
Nmr Study

scholarly journals Monte Carlo Simulations of High Field Transport in Electroluminescent Devices

VLSI Design ◽  
1998 ◽  
Vol 8 (1-4) ◽  
pp. 401-405
Author(s):  
Manfred Dür ◽  
Stephen M. Goodnick ◽  
Martin Reigrotzki ◽  
Ronald Redmer
Keyword(s):  
Band Structure ◽  
High Field ◽  
Light Emission ◽  
Essential Element ◽  
Impact Excitation ◽  
Field Energy ◽  
Pseudopotential Calculations ◽  
Full Band ◽  
Full Band Structure

High field transport in phosphor materials is an essential element of thin film electroluminescent device performance. Due to the high accelerating fields in these structures (1–3 MV/cm), a complete description of transport under high field conditions utilizing information on the full band structure of the material is critical to understand the light emission process due to impact excitation of luminescent impurities. Here we investigate the role of band structure for ZnS, GaN, and SrS based on empirical pseudopotential calculations to study its effect on the high field energy distribution of conduction band electrons.

Cation and Water Interactions in the Interlamellae of a Smectite Clay

1997 ◽  
Author(s):  
Andrea Labouriau ◽  
Cliff T. Johnston
Keyword(s):  
Nmr Spectroscopy ◽  
High Field ◽  
Model Systems ◽  
Strong Interactions ◽  
Chemical Information ◽  
Nmr Studies ◽  
Humic Materials ◽  
Structural Metals ◽  
And Diffusion

Advances in NMR instrumentation and availability have led to increased application to mineral systems and to environmental problems. The sensitivity of high-field NMR systems is nearly sufficient to work at real environmental concentrations. Even with limited sensitivity, the amount of chemical information obtained through NMR spectroscopy makes it a very valuable technique in many model systems. The application of NMR spectroscopy in mineral systems has been primarily limited to studies of the structural metals aluminum and silicon. However, in recent years there have been several publications on mobile cations in minerals, including work on the exchangeable cations in clays. Our interests lie in understanding the sorption of cations in clays, the structural sites available for that sorption, and the role of water in cation–clay interactions. Our goal is to eventually understand the molecular interactions that determine the adsorption and diffusion of cations in clays and, thus, the role of clays in determining cation transport through the geosphere. This fundamental understanding has applications in the fate of heavy metals, radionuclides, and even the mobility of nutrients for plants. It is well known that there are very strong interactions between metals and humic materials and these are also strong contributors to cation mobility. However, for simplicity, we have chosen to focus on the interactions of mobile metal ions with well-characterized clays. An NMR-based approach to this problem can take two complementary directions: first, studies of the structural components of clays such as 29Si and 27Al NMR as a function of cation or hydration; second, NMR studies of probe molecules—which in this case are the cations themselves. High magnetic field, multinuclear NMR spectrometers make it quite possible to study various “uncommon” nuclei with relative ease. It is our experience that using the cations as probe nuclei for studying sorption phenomena yields more information than studies of structural nuclei. This chapter is basically a report of work in progress on several systems that are starting to yield interesting results, which it is hoped will lead to a general understanding of these complex systems.

Role of anisotropy on high field transitions in ferrimagnetic free particles

1995 ◽  
Vol 140-144 ◽  
pp. 1519-1520 ◽  
Author(s):  
G. Asti ◽  
M. Solzi ◽  
F. Bolzoni ◽  
F. Albertini
Keyword(s):  
High Field ◽  
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