Diffusion of Na atoms on a Cu(001) surface

被引:23
作者
Cucchetti, A [1 ]
Ying, SC [1 ]
机构
[1] Brown Univ, Dept Phys, Providence, RI 02906 USA
关键词
D O I
10.1103/PhysRevB.60.11110
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We study the equilibrium properties and the diffusive motion of Na atoms adsorbed on a Cu(001) surface at finite coverages via a model Hamiltonian. Our model Hamiltonian starts with an adatom-substrate interaction potential based on the previous analysis of the zerocoverage He scattering data. The dipole-dipole interaction between the alkali adatoms at finite coverages is then included. We use Monte Carlo simulations to study the ordered structure of the system at tow temperatures and molecular-dynamics simulations for evaluating the dynamical correlation functions relevant for both the tracer and collective diffusive constants. [S0163-1829(99)14539-9].
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页码:11110 / 11117
页数:8
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