Influence of Coadsorbed Strontium Atoms on Surface Diffusion in Lithium Submonolayer Films on Tungsten (112) Face

Authors

  • A.T. Loburets Yu. Kondratyuk Poltava National Technical University
  • S.A. Zaika Yu. Kondratyuk Poltava National Technical University
  • A.G. Naumovets Institute of Physics, Nat. Acad. of Sci. of Ukraine

DOI:

https://doi.org/10.15407/ujpe57.6.661

Keywords:

-

Abstract

The surface diffusion of lithium atoms in coadsorbed Li–Sr submonolayers on the atomically anisotropic tungsten (112) face is studied, by using the method of scanning contact-potential microscopy. The influence of strongly bound and less mobile Sr adatoms on the diffusion kinetics of more mobile Li atoms is analyzed. Coadsorbed strontium atoms are found to strongly suppress the diffusion of lithium ones. The concentration dependences are obtained for the
chemical diffusion coefficients, activation energy, and pre-exponential factor in the Arrhenius equation. Possible mechanisms of surface diffusion in coadsorbed films are considered, by taking the nature of the lateral interaction between adatoms into account, which is responsible for the formation of long-period chain structures. A conclusion is drawn that the collective mechanisms of diffusion, which give rise to the exponential growth of diffusion
coefficients, become active as the lithium coverage degree increases so that the film becomes structurally incommensurate with the substrate. The results obtained can be applied to the development of technologies for the modification of physico-chemical properties of surfaces.

References

A.T. Loburets, A.G. Naumovets, N.B. Senenko, and Yu.S. Vedula, Z. Phys. Chem. 202, 75 (1997).

https://doi.org/10.1524/zpch.1997.202.Part_1_2.075

A.T. Loburets, N.B. Senenko, Yu.S. Vedula, and A.G. Naumovets, Ukr. J. Phys. 50, 805 (2005).

A.T. Loburets, N.B. Senenko, M.A. Mukhtarov, Yu.S. Vedula, and A.G. Naumovets, Defect Diffus. Forum 277, 201 (2008).

https://doi.org/10.4028/www.scientific.net/DDF.277.201

A.T. Loburets, Metallofiz. Noveish. Tekhnol. 21, 43 (1999).

A.T. Loburets, N.B. Senenko, Yu.S. Vedula, and A.G. Naumovets, in Atomistic Aspects of Epitaxial Growth, edited by M. Kotrla (Kluwer, Dordrecht, 2002), p. 1.

https://doi.org/10.1007/978-94-010-0391-9_1

A.G. Naumovets, Physica A 357, 189 (2005).

https://doi.org/10.1016/j.physa.2005.06.027

A.G. Naumovets and Yu.S. Vedula, Surf. Sci. Rep. 4, 365 (1984).

https://doi.org/10.1016/0167-5729(85)90007-X

V.K. Medvedev and A.I. Yakivchuk, Ukr. Fiz. Zh. 20, 1900 (1975).

V.K. Medvedev, A.G. Naumovets, and T.P. Smereka, Surf. Sci. 34, 368 (1973).

https://doi.org/10.1016/0039-6028(73)90123-4

J. Philibert, Atom Movements. Diffusion and Mass Transport in Solids (Les Editions des Physique, Les Ulis, 1991).

T. Biernat, Ch. Kleint, and R. Meclewski, Appl. Surf. Sci. 67, 206 (1993).

https://doi.org/10.1016/0169-4332(93)90313-Z

A.G. Naumovets, M.V. Paliy, Yu.S. Vedula, A.T. Loburets, and N.B. Senenko, Progr. Surf. Sci. 48, 59 (1995).

https://doi.org/10.1016/0079-6816(95)93415-4

A.T. Loburets, N.B. Senenko, A.G. Naumovets, and Yu.S. Vedula, Phys. Low-Dim. Struct. 10/11, 49 (1995).

O.M. Braun and R. Ferrando, Phys. Rev. E 65, 061107 (2002).

https://doi.org/10.1103/PhysRevE.65.061107

O.M. Braun and V.K. Medvedev, Usp. Fiz. Nauk 157, 631 (1989).

https://doi.org/10.3367/UFNr.0157.198904c.0631

I.F. Lyuksyutov, A.G. Naumovets, and V.L. Pokrovsky, Two-Dimensional Crystals (Academic Press, Boston, 1992).

https://doi.org/10.1016/B978-0-08-092439-7.50008-3

A.T. Loburets, A.G. Naumovets, and Yu.S. Vedula, in Surface Diffusion: Atomistic and Collective Processes, edited by M.C. Tringides (Plenum Press, New York, 1997), p. 509.

https://doi.org/10.1007/978-1-4899-0262-7_45

Published

2012-06-30

How to Cite

Loburets А., Zaika С., & Naumovets А. (2012). Influence of Coadsorbed Strontium Atoms on Surface Diffusion in Lithium Submonolayer Films on Tungsten (112) Face. Ukrainian Journal of Physics, 57(6), 661. https://doi.org/10.15407/ujpe57.6.661

Issue

Section

Solid matter

Most read articles by the same author(s)