Zobrazeno 1 - 10
of 83
pro vyhledávání: '"G.E. Tommei"'
Publikováno v:
ResearcherID
The jump rate and the jump-length probability distribution (JLPD) are calculated in a periodic potential with exponentially decaying memory friction, solving the generalized Langevin equation (GLE) by the matrix-continued-fraction method (MCFM). It i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f274b6392a59dccedb6aa0faf082c36
https://doi.org/10.1016/s0009-2614(01)01070-3
https://doi.org/10.1016/s0009-2614(01)01070-3
Publikováno v:
ResearcherID
An analytical "quasi-2D" approximation (Q2DA) for the diffusion coefficient of an adatom migrating in a rectangular lattice, in the presence of a high damping and of a general 2D-coupled potential, is derived. The validity of the Q2DA lies on the ass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a03844e76fd7c3bd6463d14cd1788ec
https://doi.org/10.1142/s0218625x97000894
https://doi.org/10.1142/s0218625x97000894
Publikováno v:
ResearcherID
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93ed3531075581931876b1b44b51cafc
https://doi.org/10.1103/physreve.51.r1645
https://doi.org/10.1103/physreve.51.r1645
Publikováno v:
Chemical Physics Letters. 224:308-312
The separation of time scales for jump rate problems in periodic potentials is investigated down to barriers as low as the thermal energy in the spatial diffusion regime. The jump rate and the time of flight between nearest wells are obtained by comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2442ac79219eaea5a6d3f2323df65cf
https://doi.org/10.1016/0009-2614(94)00552-4
https://doi.org/10.1016/0009-2614(94)00552-4
Publikováno v:
ResearcherID
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d16230aeffa2a7fc3bbf5d5bd6cda11
https://doi.org/10.1103/physrevb.45.444
https://doi.org/10.1103/physrevb.45.444
Publikováno v:
Surface Science. :773-777
The diffusion of a classical particle in a 2D periodic field of force is studied, solving a Fokker-Planck equation in the high friction limit (Wilemski equation) with a simple cosine potential. The quasi-elastic dynamic structure factor is expressed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36e2c5f5edfc5bdb662a77ac49bec417
https://doi.org/10.1016/0039-6028(91)91096-g
https://doi.org/10.1016/0039-6028(91)91096-g
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 173:141-154
The classical diffusion of a particle in a periodic system is studied employing the Smoluchowski equation with an external periodic field of force. Assuming a two-dimensional rectangular symmetry and an external potential of a simple cosine shape, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::869ea87acadc3fbe0d9b8da91a1ea606
https://doi.org/10.1016/0378-4371(91)90255-b
https://doi.org/10.1016/0378-4371(91)90255-b
Energetics of fcc and decahedral nanowires of Ag, Cu, Ni, andC60:A quenched molecular dynamics study
Publikováno v:
Physical Review B. 69
The energetics of nanowires of several materials is studied by quenched molecular dynamics with the aim of comparing wires pertaining to two different types of structures, fcc and pentagonal, which are expected to be among the most favorable ones for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b0eb769c9cf4cfc0b7040508f71e879
https://doi.org/10.1103/physrevb.69.115426
https://doi.org/10.1103/physrevb.69.115426
Publikováno v:
Collective Diffusion on Surfaces: Correlation Effects and Adatom Interactions ISBN: 9780792371168
The jump diffusion at crystal surfaces is studied by means of three stochastic equations, the Fokker-Planck, the Bhatnagar-Gross-Krook and the Fokker-Planck equation with memory. The equations are solved calculating the jump rate and the jump-length
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e94d64c1369fe3f6dfbe92634c40a92
https://doi.org/10.1007/978-94-010-0816-7_26
https://doi.org/10.1007/978-94-010-0816-7_26
Publikováno v:
ResearcherID
The diffusion coefficient D in a periodic potential with exponentially decaying memory friction is studied by the matrix-continued-fraction method. It is shown that, at sufficiently high static friction, D presents a maximum as a function of the memo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e02d4214434c3ba0007280bd1c8ede4
http://hdl.handle.net/11567/331486
http://hdl.handle.net/11567/331486