Search results

Sort By:

Limit search:

Influence of Atomic and Electronic Structure of a Tip on Stm Images

100%

Jurczyszyn L., Mingo N., Flores F.

Acta Physica Polonica A

1998

vol. 93

issue 2

307-315

Theoretical studies of the influence of electronic and atomic structure of a tip on scanning tunneling microscopy images are presented. Results are discussed for the scanning of Al(001) and Al(001)+Xe surfaces performed within aluminum and nickel tips of a different geometry.

A Theoretical Analysis of Ballistic Electron Emission Microscopy: Band Structure Effects and Attenuation Lengths

76%

de Andres P., Reuter K., Garcia-Vidal F., Flores F., Hohenester U., Kocevar P.

Acta Physica Polonica A

1998

vol. 93

issue 2

281-287

Using a quantum mechanical approach, we compute the ballistic electron emission microscopy current distribution in reciprocal space to compare experimental and theoretical spectroscopic I(V) curves. In the elastic limit, this formalism is a "parameter-free" representation of the problem. At low voltages, low temperatures, and for thin metallic layers, the elastic approximation is enough to explain the experiments (ballistic conditions). At low temperatures, inelastic effects can be taken into account approximately by introducing an effective electron-electron lifetime as an imaginary part in the energy. Ensemble Monte Carlo calculations were also performed to obtain ballistic electron emission microscopy currents in good agreement with the previous approach.

Refine search results

2 Acta Physica Polonica A

2 1998

2 Flores F.

1 Garcia-Vidal F.

1 Hohenester U.

1 Jurczyszyn L.

1 Kocevar P.

1 Mingo N.

1 Reuter K.

1 de Andres P.

Search results

Influence of Atomic and Electronic Structure of a Tip on Stm Images

A Theoretical Analysis of Ballistic Electron Emission Microscopy: Band Structure Effects and Attenuation Lengths