Fermi acceleration as a possible mechanism of rapid diffusion of gold clusters on graphite

Krasnova, A. K.; Chichigina, O. A.

doi:10.3103/s0027134912010122

Cited by 5 publications

(1 citation statement)

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“…The anomalously high diusion coecients for dierent metallic clusters on highly oriented pyrolytic graphite (HOPG) were discovered in experiments [5,11]. It was shown [12] that the properties of the graphite substrate are probably responsible for the eect, since fast diusion was observed on graphite for dierent metallic clusters. The clusters interact with a part of the graphite layer called the 'flake'.…”

Section: Introductionmentioning

confidence: 98%

The distribution of velocities in an ensemble of accelerated particles on a surface

2016

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. An ensemble of particles diffusing with acceleration on a surface is considered as a 2D billiard system. The process of the finite-time diffusion of particles is studied using the balance equation. The probability distribution functions of the velocity and lifetime of particles are obtained analytically and by means of numerical simulations. A thermodynamic interpretation of the process is discussed. The effective temperature and entropy obey the relationship for an ideal gas.

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Section: Introductionmentioning

confidence: 98%

The distribution of velocities in an ensemble of accelerated particles on a surface

2016

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Velocity distribution for quasistable acceleration in the presence of multiplicative noise

2013

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Processes that are far both from equilibrium and from phase transition are studied. It is shown that a process with mean velocity that exhibits power-law growth in time can be analyzed using the Langevin equation with multiplicative noise. The solution to the corresponding Fokker-Planck equation is derived. Results of the numerical solution of the Langevin equation and simulation of the motion of particles in a billiard system with a time-dependent boundary are presented.

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Relaxation dynamics in the presence of pulse multiplicative noise sources with different correlation properties

et al. 2015

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The relaxation dynamics of a system described by a Langevin equation with pulse multiplicative noise sources with different correlation properties is considered. The solution of the corresponding Fokker-Planck equation is derived for Gaussian white noise. Moreover, two pulse processes with regulated periodicity are considered as a noise source: the dead-time-distorted Poisson process and the process with fixed time intervals, which is characterized by an infinite correlation time. We find that the steady state of the system is dependent on the correlation properties of the pulse noise. An increase of the noise correlation causes the decrease of the mean value of the solution at the steady state. The analytical results are in good agreement with the numerical ones.

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Fermi acceleration as a possible mechanism of rapid diffusion of gold clusters on graphite

Cited by 5 publications

References 20 publications

The distribution of velocities in an ensemble of accelerated particles on a surface

The distribution of velocities in an ensemble of accelerated particles on a surface

Velocity distribution for quasistable acceleration in the presence of multiplicative noise

Relaxation dynamics in the presence of pulse multiplicative noise sources with different correlation properties

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