Auger de-excitation of metastable molecules at metallic surfaces

Details Auger de-excitation of metastable molecules at metallic surfaces Auger de-excitation of metastable molecules at metallic surfaces

2010-12-16

arxiv.org/abs/1012.3576v2

Phys. Rev. B 84, 085443 (2011)

Physics

Condensed Matter

Other Condensed Matter

15 pages, 9 figures, revised version using an improved single-electron basis

Scientific paper

We study secondary electron emission from metallic surfaces due to Auger de-excitation of diatomic metastable molecules. Our approach is based on an effective model for the two active electrons involved in the process -- a molecular electron described by a linear combination of atomic orbitals when it is bound and a two-center Coulomb wave when it is not and a metal electron described by the eigenfunctions of a step potential -- and employs Keldysh Green's functions. Solving the Dyson equation for the retarded Green's function by exponential resummation we are able to treat time-nonlocal self-energies and to avoid the wide-band approximation.Results are presented for the de-excitation of \NitrogenDominantMetastableState\ on aluminum and tungsten and discussed in view of previous experimental and theoretical investigations. We find quantitative agreement with experimental data for tungsten indicating that the effective model captures the physics of the process quite well. For aluminum we predict secondary electron emission due to Auger de-excitation to be one to two orders of magnitude smaller than the one found for resonant charge-transfer and subsequent auto-detachment.

Affiliated with

Also associated with

No associations

Rating

Auger de-excitation of metastable molecules at metallic surfaces does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Auger de-excitation of metastable molecules at metallic surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auger de-excitation of metastable molecules at metallic surfaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-219101