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Nonlinear Physics and Far from Equilibrium Systems
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Transport on solid
surfaces
Transport
of particles on crystalline surfaces
presents a very rich phenomenology
and constitutes a field of big technological
interest. We are interested in the
phenomena of sorting that can take
place when, in the presence of an
external force, the particles acquire
velocities that deviate from the direction
of the applied force, being this deviation
dependent on the characteristics of
the particles. There are recent experiments
on the sorting of colloidal particles
under periodic potentials and on sorting
of DNA using localized obstacles.
Inspired by these experiments, we
model these situations through Langevin
equations, with bidimensional potentials
of appropriate form, including different
kinds of asymmetries. |
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- Publications
An
analytical approach to sorting in periodic
potentials
J.P Gleeson,
J.M. Sancho, A.M. Lacasta and K. Lindenberg,
Submitted to Phys. Rev. E (2005).
Particle separation
by external fields on periodic surfaces,
J.M. Sancho,
M. Khoury, K. Lindenberg and A.M. Lacasta
J.
Phys.: Condens. Matter 17,
S4151-S4163 (2005).
Sorting on periodic
surfaces,
A. M.
Lacasta, J. M. Sancho, A. H. Romero,
and K. Lindenberg,
Phys. Rev. Lett. 94, 160601
(2005).
Transport and
diffusion on crystalline surfaces under
external forces,
K. Lindenberg, A.M. Lacasta, J.M. Sancho
and A.H. Romero,
New Journal of Physics 7
(2005) 29.
From subdiffusion
to superdiffusion of particles on solid
surfaces,
A.M. Lacasta, J.M. Sancho, A.H. Romero,
I.M. Sokolov, K. Lindenberg,
Physical Review E 70
, 051104 (2004).
Diffusion on
a Solid Surface: Anomalous is Normal,
J.M. Sancho, A.M. Lacasta, K. Lindenberg,
I.M. Sokolov and A.H. Romero,
Physical
Review Letters 92 , 250601 (2004).
Modelization
of surface diffusion of a molecular
dimer,
A.H. Romero, A.M. Lacasta and J.M. Sancho,
Physical
Review E 69 , 051105 (2004).
Selected by "Virtual Journal of Nanoscale
Science & Technology" as an important
contribution, May 31st, 2004.
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Secció
del Departament de Física Aplicada EPSEB
Av. Dr. Marañón 44 - 08028 Barcelona - Tel.:
93-401 62 63 - blas@fa.upc.edu
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