info:eu-repo/semantics/article
Sequential desorption of dimers from square lattices: A novel mechanism for phase transitions
Registro en:
Manzi, Sergio Javier; Boscoboinik, J. A.; Belardinelli, Rolando Elio; Pereyra, Victor Daniel; Sequential desorption of dimers from square lattices: A novel mechanism for phase transitions; Elsevier Science; Physica A: Statistical Mechanics And Its Applications; 389; 19; 10-2010; 4116-4126
0378-4371
Autor
Manzi, Sergio Javier
Boscoboinik, J. A.
Belardinelli, Rolando Elio
Pereyra, Victor Daniel
Resumen
This work describes a novel mechanism for phase transitions during desorption, involving the formation of lattice size dependent intermediate states when there is enough adsorbate mobility. Monte Carlo simulations are performed to analyze the mechanism of the thermal desorption for adsorbed homonuclear dimers on two-dimensional square lattices. The latticegas model with nearest-neighbor repulsive interactions between particles is implemented to study the cases of mobile (with diffusion) and immobile desorption. The number of peaks for the immobile desorption spectra is related to the connectivity of the adsorbed species for both monomer and dimer molecules. However, for the case of mobile desorption, the spectra give information about the desorption mechanism, which differs significantly for monomers and dimers, particularly when the initial temperatures correspond to the critical region. Fil: Manzi, Sergio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina. Universidad Nacional de San Luis; Argentina Fil: Boscoboinik, J. A.. University Of Wisconsin; Estados Unidos Fil: Belardinelli, Rolando Elio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina. Universidad Nacional de San Luis; Argentina Fil: Pereyra, Victor Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina. Universidad Nacional de San Luis; Argentina