Field Stimulated Surface Diffusion of Lithium on Germanium (100) and (111) Planes

• Authors: Yu. Suchorski
• Languages of publication: EN

Abstracts

EN

Field stimulated surface diffusion of lithium on atomically clean (100) and (111) germanium single crystal planes has been investigated by means of field emission method. Sealed-off field emission tube with a channel multiplier was used. The surface density of lithium adatoms on the germanium surface was determined applying a standard tungsten (112) crystal plane. The dependences of the surface diffusion activation energy on the applied electric field at different lithium coverages lave been obtained. The initial dipole moment of Li adatoms on the Ge (100) and (111) planes was then determined. The values 1.3 ± 0.2 and 1.0 ± 0.2 debye obtained for the Li-Ge (100) and Li-Ge (111) systems respectively are in good agreement with the ones calculated from the work function measurements. The reverse effect of the field influence on the surface diffusion of lithium on Ge (100) and (111) planes has been observed as the second lithium layer is filling. Relative contributions of the peculiarities of semiconductor substrate and alkali adsorbate on the properties of adsystems are discussed on the basis of experimental results.

Keywords

EN

79.70.+q; 68.35.Fx

Discipline

• 79.70.+q: Field emission, ionization, evaporation, and desorption
• 68.35.Fx: Diffusion; interface formation(see also 66.30.-h Diffusion in solids, for diffusion of adsorbates, see 68.43.Jk)

• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 81
• Issue: 2
• Pages: 295-302

Dates

published

1992-02

received

1991-05-21

(unknown)

1991-05-27

Contributors

author

Yu. Suchorski

• Department of Physics, Technical University of Lvov, Mira St. 12, 290646, Lvov, Ukraine

Identifiers

DOI

10.12693/APhysPolA.81.295