scholarly journals Kinetics of physical adsorption of ethane on Ir(110)‐(1×2): Molecular beam reflectivity measurements and Monte Carlo simulations

1990 ◽  
Vol 8 (3) ◽  
pp. 2538-2542 ◽  
Author(s):  
H. C. Kang ◽  
C. B. Mullins ◽  
W. H. Weinberg
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Molecular Beam ◽  
Physical Adsorption ◽  
Kinetics Of

Molecular beam measurements and Monte Carlo simulations of the kinetics of N2O decomposition on Rh(111) single-crystal surfaces

2006 ◽  
Vol 125 (7) ◽  
pp. 074705 ◽  
Author(s):  
Rodolfo Omar Uñac ◽  
Victor Bustos ◽  
Jarod Wilson ◽  
Giorgio Zgrablich ◽  
Francisco Zaera
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Single Crystal ◽  
Molecular Beam ◽  
N2o Decomposition ◽  
Crystal Surfaces ◽  
Single Crystal Surfaces ◽  
Kinetics Of

scholarly journals Kinetics of Molecular Beam Epitaxy: Effect of Ion-Induced Sputtering

1990 ◽  
Vol 202 ◽  
Author(s):  
Peter M. Richards
Keyword(s):  
Monte Carlo ◽  
Steady State ◽  
Binding Energy ◽  
Molecular Beam Epitaxy ◽  
Monte Carlo Simulations ◽  
Molecular Beam ◽  
Ion Beam ◽  
Kinetics Of

ABSTRACTSteady state roughness of surfaces growing by molecular beam epitaxy is investigated by Monte Carlo simulations under conditions where an ion beam is also present which sputters adatoms off the surface. If the sputtering is random, it only increases the roughness. But if the sputtering probability is strongly dependent on the binding energy of an adatom within a cluster or island, the ions can have a smoothening effect. Physical arguments are given in support of the results.

Growth Kinetics of Molecular Beam Epitaxy on Non-Singular Surfaces

1992 ◽  
Vol 280 ◽  
Author(s):  
J. F. Egler ◽  
N. Otsuka ◽  
K. Mahalingam
Keyword(s):  
Surface Roughness ◽  
Monte Carlo ◽  
Growth Kinetics ◽  
Molecular Beam ◽  
Singular Surface ◽  
Sticking Coefficient ◽  
Singular Surfaces ◽  
Vicinal Surfaces ◽  
Kinetics Of ◽  
Multiple Configurations

ABSTRACTGrowth kinetics on non-singular surfaces were studied by Monte Carlo simulations. In contrast to the growth on singular and vicinal surfaces, the sticking coefficient on the non-singular surfaces was found to decrease with increase of the surface roughness. Simulations of annealing processes showed that surface diffusion of atoms leads to a stationary surface roughness, which is explained by multiple configurations having the lowest energy in the non-singular surface.

Kinetics of B2, DO3, and B32 ordering: Results from pair approximation calculations and Monte Carlo simulations

1994 ◽  
Vol 9 (2) ◽  
pp. 348-356 ◽  
Author(s):  
L. Anthony ◽  
B. Fultz
Keyword(s):  
Monte Carlo ◽  
Kinetic Theory ◽  
Monte Carlo Simulations ◽  
Nearest Neighbor ◽  
Pair Approximation ◽  
Probability Method ◽  
Critical Temperatures ◽  
Point Pair ◽  
Bcc Lattice ◽  
Kinetics Of

A kinetic theory of ordering based on the path probability method was implemented in the pair (Bethe) approximation and used to study the kinetics of short- and long-range ordering in alloys with equilibrium states of B2, DO3, or B32 order. The theory was developed in a superposition approximation for a vacancy mechanism on a bcc lattice with first- (1nn) and second-nearest neighbor (2nn) pair interactions. Chained 1nn conditional probabilities were used to account for the entropy of 2nn pair configurations. Monte Carlo simulations of ordering were also performed and their results compared to predictions of the pair approximation. Comparisons are also made with predictions from an earlier kinetic theory implemented in the point (Bragg-Williams) approximation. For all three calculations (point, pair, and Monte Carlo), critical temperatures for B2 and DO3 ordering are reported for different 1nn and 2nn interaction strengths. The influence of annealing temperature on the kinetic paths through the space of B2, DO3, and B32 order parameters was found to be strong when the thermodynamic preferences for the ordered states were of similar strengths. Transient states of intermediate order were also studied. A transient formation of B32 order in an AB3 alloy was found when 2nn interactions were strong, even when B32 order was neither a Richards-Allen-Cahn ground state nor a stable equilibrium state at that temperature. The formation of this transient B32 order can be argued consistently from a thermodynamic perspective. However, a second example of transient B2 order in an AB alloy with equilibrium B32 order cannot be explained by the same thermodynamic argument, and we believe that its origin is primarily kinetic.

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