@InProceedings{RamosGrAcYiElAl:2009:NoReDy,
               author = "Ramos, J. A. P. and Granato, Enzo and Achim, C. V. and Ying, S. C. 
                         and Elder, K. R. and Ala-Nissila, T.",
          affiliation = "{Universidade Estadual do Sudoeste da Bahia} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Helsinki University 
                         of Technology} and {Brown University} and {Oakland University} and 
                         {Brown University}",
                title = "Nonlinear response and dynamical transitions in a phase Żeld 
                         crystal model for adsorbed overlayers",
            booktitle = "Proceedings...",
                 year = "2009",
         organization = "Latin American Workshop on Nonlinear Phenomena.",
             abstract = "We study numerically the nonlinear response and sliding friction 
                         behavior in a phase field crystal model for adsorbed layers in 
                         presence of thermal fluctuations 1;2. The model describes the 
                         layer as a continuous density field in presence of a pinning 
                         potential and external driving force allowing for both elastic and 
                         plastic deformation, and inertial effects. At low temperatures and 
                         in presence of inertial effects we find that the velocity response 
                         of an initially commensurate layer shows hysteresis with dynamical 
                         melting and freezing transitions for increasing and decreasing 
                         applied forces at different critical values. The main features of 
                         the nonlinear response are similar to the results obtained 
                         previously with molecular dynamics simulations of particles 3;4. 
                         However, the dynamical melting and freezing mechanisms are 
                         signifficantly different corresponding to nucleations of stripes 
                         rather than closed domains. 1J.A.P. Ramos, E. Granato, C.V. Achim, 
                         S.C. Ying, K.R. El- der, T. Ala-Nissila, Phys. Rev. E 78, 031109 
                         (2008); 2C.V. Achim, J.A.P. Ramos, M. Karttunen, K.R. Elder, E. 
                         Granato,T. Ala-Nissila, and S.C. Ying, Phys. Rev. E 79, 011606 
                         (2009); 3B.N.J. Persson, Phys. Rev. Lett. 71, 1212 (1993);4E. 
                         Granato and S.C. Ying, Phys. Rev. Lett. 85, 5368 (2000). Work 
                         supported by Funda{\c{c}}{\~a}o de Amparo {\`a} Pesquisa do 
                         Estado de S{\~a}o Paulo (FAPESP) under Grant No. 07/08492-9. 
                         S.C.Y. also acknowledges the support from FAPESP (Grant No. 09/ 
                         01942-4).",
  conference-location = "B{\'u}zios, RJ",
      conference-year = "05-09 Oct.",
           targetfile = "ramos_nonlinear.pdf",
        urlaccessdate = "29 jun. 2024"
}