Metal surface dipole moment and work function in the linear potential model

1991 ◽  
Vol 13 (12) ◽  
pp. 1439-1447
Author(s):  
A. E. Mohammed ◽  
A. Y. Ghaly ◽  
O. M. Frege
Keyword(s):  
Dipole Moment ◽  
Work Function ◽  
Metal Surface ◽  
Potential Model ◽  
Linear Potential ◽  
Surface Dipole

scholarly journals Metal Surface Dipole Moment and Work Function in the Linear Potential Model

1991 ◽  
Vol 80 (4) ◽  
pp. 591-600
Author(s):  
A.E. Mohammed ◽  
A.Y. Ghaly ◽  
O.M. Frege
Keyword(s):  
Dipole Moment ◽  
Work Function ◽  
Metal Surface ◽  
Potential Model ◽  
Linear Potential ◽  
Surface Dipole

scholarly journals FIRST-PRINCIPLES STUDY OF THE EFFECTS OF GOLD ADSORPTION ON THE Al(001) SURFACE PROPERTIES

2008 ◽  
Vol 19 (10) ◽  
pp. 1563-1579 ◽  
Author(s):  
N. ZARE DEHNAVI ◽  
M. PAYAMI
Keyword(s):  
Dipole Moment ◽  
Work Function ◽  
Density Functional ◽  
Potential Method ◽  
Ionic Charge ◽  
Functional Theory ◽  
Adsorption Sites ◽  
The Density Functional Theory ◽  
Surface Dipole ◽  
Pseudo Potential

In this paper, we have studied theoretically the effects of gold adsorption on the Al (001) surface, using ab initio pseudo-potential method in the framework of the density functional theory. Having found the hollow sites at the Al (001) surface as the most preferred adsorption sites, we have investigated the effects of the Au adsorption with different coverages (Θ =0.11, 0.25, 0.50, 0.75, 1.00 ML) on the geometry, adsorption energy, surface dipole moment, and the work function of the Al (001) surface. The results show that even though the work function of the Au substrate increases with the Au coverage, the surface dipole moment decreases with the changes in coverage from Θ =0.11 to 0.25 ML. We have explained this behavior by analyzing the electronic and ionic charge distributions. Furthermore, by studying the diffusion of Au atoms into the substrate, we have shown that at room temperature the diffusion rate of Au atoms into the substrate is negligible but increasing the temperature to about 200°C the Au atoms significantly diffuse into the substrate, in agreement with the experiment.

Linear bounded potential model for semiconductor band bending

2022 ◽  
Author(s):  
Facundo Villavicencio ◽  
Jorge Mario Ferreyra ◽  
German Bridoux ◽  
Manuel Villafuerte
Keyword(s):  
Potential Model ◽  
Simple Expression ◽  
Linear Potential ◽  
Charge Balance ◽  
Band Bending ◽  
Mass Approximation ◽  
Hole Confinement ◽  
Dimensional Electron Gas ◽  
Analytical Expressions ◽  
Franz Keldysh Effect

Abstract We propose a simple but unexplored model for the semiconductor band bending with the aim to obtain a relatively simple expression to calculate the energy spectrum for the confined levels and the analytical expressions for wave-functions. This model consists of a linear potential but it is bounded or trimmed in energy unlike the well known wedge potential model. We present exact solutions for this potential in the frame of the effective mass approximation and they are valid for electron or hole confinement potential. This model provides a more adequate physical scenario than the wedge potential since it takes into account the charge balance involved in the band bending potential. These results allow to treat confined potential problems as in the case of a two-dimensional electron gas (2DEG) in a simplified way. We discuss the application of this approximation to the recombination time of electrons an holes and for the Franz-Keldysh effect.

Proton charge form factors for a linear-potential model with gluon exchange

1978 ◽  
Vol 17 (3) ◽  
pp. 874-878 ◽  
Author(s):  
C. Y. Hu ◽  
S. A. Moszkowski ◽  
D. L. Shannon
Keyword(s):  
Potential Model ◽  
Form Factors ◽  
Linear Potential ◽  
Charge Form ◽  
Gluon Exchange ◽  
Proton Charge

scholarly journals Analysis of the Changes in Electronic Structures and Work Function Variation in Alkali Metal^|^mdash;Metal Surface Systems

2014 ◽  
Vol 57 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Allan Abraham B. PADAMA ◽  
Kohei OKA ◽  
Wilson Agerico DI^|^Ntilde;O ◽  
Hideaki KASAI
Keyword(s):  
Alkali Metal ◽  
Work Function ◽  
Metal Surface ◽  
Electronic Structures

scholarly journals DESCRIBING RECENTLY DISCOVERED NARROW STATES AS QUARKONIA USING A POTENTIAL MODEL

2005 ◽  
Vol 20 (16) ◽  
pp. 3774-3776 ◽  
Author(s):  
STANLEY F. RADFORD ◽  
WAYNE W. REPKO
Keyword(s):  
Long Range ◽  
Short Distance ◽  
Bound States ◽  
Potential Model ◽  
Linear Potential

We examine to what extent several recently discovered narrow resonances can be interpreted as conventional [Formula: see text] bound states describable using a potential model. In doing so, we use a semirelativistic approach, which includes both the v2/c2 and QCD one-loop corrections to the short distance potential and a long range linear potential together with its scalar and vector v2/c2 spin-dependent terms.

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