Zobrazeno 1 - 10
of 455
pro vyhledávání: '"Achim, C"'
Publikováno v:
Phys. Rev. E 93, 053003 (2016)
The phase field crystal (PFC) approach extends the notion of phase field models by describing the topology of the microscopic structure of a crystalline material. One of the consequences is that local variation of the interatomic distance creates an
Externí odkaz:
http://arxiv.org/abs/1603.03189
Autor:
Heinonen, V., Achim, C. V., Kosterlitz, J. M., Ying, See-Chen, Lowengrub, J., Ala-Nissila, T.
Publikováno v:
Phys. Rev. Lett. 116, 024303 (2016)
We use the amplitude expansion in the phase field crystal framework to formulate an approach where the fields describing the microscopic structure of the material are coupled to a hydrodynamic velocity field. The model is shown to reduce to the well
Externí odkaz:
http://arxiv.org/abs/1509.08057
Publikováno v:
Phys. Rev. Lett. 112, 255501 (2014)
The growth of quasicrystals, i.e., aperiodic structures with long-range order, seeded from the melt is investigated using a dynamical phase field crystal model. Depending on the thermodynamic conditions, two different growth modes are detected, namel
Externí odkaz:
http://arxiv.org/abs/1405.5434
Publikováno v:
Phys. Rev. E 89, 032411 (2014)
Phase field crystal (PFC) models constitute a field theoretical approach to solidification, melting and related phenomena at atomic length and diffusive time scales. One of the advantages of these models is that they naturally contain elastic excitat
Externí odkaz:
http://arxiv.org/abs/1311.7336
Autor:
Granato, E., Ramos, J. A. P., Achim, C. V., Lehikoinen, J., Ying, S. C., Ala-Nissila, T., Elder, K. R.
Publikováno v:
Phys. Rev. E 84, 031102 (2011)
We study the structural correlations and the nonlinear response to a driving force of a two-dimensional phase-field-crystal model with random pinning. The model provides an effective continuous description of lattice systems in the presence of disord
Externí odkaz:
http://arxiv.org/abs/1109.0247
Publikováno v:
J. Stat. Mech. P05033 (2011)
A previously developed field-theoretic model [R.D. Coalson et al., J. Chem. Phys. 102, 4584 (1995)] that treats core collisions and Coulomb interactions on the same footing is investigated in order to understand ion size effects on the partition of n
Externí odkaz:
http://arxiv.org/abs/1105.2747
Publikováno v:
Technische Mechanik 30, 169-176 (2010)
We apply the phase field crystal model to study the structure and energy of symmetric tilt grain boundaries of bcc iron in 3D. The parameters for the model are obtained by using a recently developed eight-order fitting scheme [A. Jaatinen et al., Phy
Externí odkaz:
http://arxiv.org/abs/1006.5405
Publikováno v:
Phys. Rev. E 81, 011121 (2010)
We study the nonlinear driven response and sliding friction behavior of the phase-field-crystal (PFC) model with pinning including both thermal fluctuations and inertial effects. The model provides a continuous description of adsorbed layers on a sub
Externí odkaz:
http://arxiv.org/abs/1001.1260
Autor:
Achim, C. V., Ramos, J. A. P., Karttunen, M., Elder, K. R., Granato, E., Ala-Nissila, T., Ying, S. C.
Publikováno v:
Phys. Rev. E 79, 011606 (2009)
We study numerically the phase diagram and the response under a driving force of the phase field crystal model for pinned lattice systems introduced recently for both one and two dimensional systems. The model describes the lattice system as a contin
Externí odkaz:
http://arxiv.org/abs/0902.2038
Publikováno v:
Phys. Rev. E 78, 031109 (2008)
We study the influence of thermal fluctuations in the phase diagram of a recently introduced two-dimensional phase field crystal model with an external pinning potential. The model provides a continuum description of pinned lattice systems allowing f
Externí odkaz:
http://arxiv.org/abs/0808.3184