Sequential desorption of dimers from square lattices: A novel mechanism for phase transitions

Manzi, Sergio Javier; Boscoboinik, J. Anibal; Belardinelli, R. E.; Pereyra, V.

doi:10.1016/j.physa.2010.05.055

Cited by 1 publication

(3 citation statements)

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“…However, motion of dimers or larger particle clusters in many systems is not just a simple combination of singleparticle jumps. Single-particle and dimer mobility was the subject of studies in many systems [6,7,8,9,10]. Dimer diffusion quite often appears to be higher and more important for the surface processes at least within some ranges of temperatures [6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Single-particle and dimer mobility was the subject of studies in many systems [6,7,8,9,10]. Dimer diffusion quite often appears to be higher and more important for the surface processes at least within some ranges of temperatures [6,7,8,9]. Dimer jumps can also have anisotropy different from that of single-particle jumps [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Systems where single-particle jump rates were modified due to the presence of neighboring particles were studied in various context at lattices of different symmetries [1,11,12,13,14,15,16,17]. Similarly collective dynamics of many jumping dimers can be analyzed [6]. At real surfaces dimers quite often occupy sites of different locations than single particles do [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

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Diffusive motion of particles and dimers over anisotropic lattices

Mińkowski¹,

Załuska²

2013

Preprint

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Behavior of the mixture of particles and dimers moving with different jump rates at reconstructed surfaces is described. Collective diffusion coefficient is calculated by the variational approach. Anisotropy of the collective particle motion is analyzed as a function of jump rates and local particle density. Analytic expressions are compared with the results of Monte Carlo simulations of diffusing particle and dimer mixture. Direction of driven diffusive motion of the same system depends on the jump anisotropy and on the value of driving force. Driven motion results in the particle and dimer separation when the directions of their easy diffusion axes differ. It is shown that in such case trapping sites concentrated at some surface areas act as filters or barriers for particle and dimer mixtures.

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