Spin Blocking in the Correlated Double-Electron Capture from Metal Surfaces

The resonant capture of electrons from a metallic surface into the outer shell of a helium ion creates doubly excited states in a spin singlet (↑↓) or triplet (↑↑) configuration. Here it is shown that the capture of one or two electrons can be described in a simple quantitative model, and the captur...

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Veröffentlicht in:	Physical review letters 2015-07, Vol.115 (2), p.027602-027602, Article 027602
1. Verfasser:	Tusche, C
Format:	Artikel
Sprache:	eng
Schlagworte:	Blocking Correlation Fermi surfaces Helium Ion exchangers Mathematical models Metal surfaces Occupation
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description	The resonant capture of electrons from a metallic surface into the outer shell of a helium ion creates doubly excited states in a spin singlet (↑↓) or triplet (↑↑) configuration. Here it is shown that the capture of one or two electrons can be described in a simple quantitative model, and the capture of two electrons by He(++) proceeds in a single step. The double capture of electrons from the Fermi energy of the metal is dominated by the spin dependent electron correlation that blocks the occupation of triplet states in the ion, but creates a singlet two-hole final state at the surface, related to the concept of the exchange-correlation hole.
doi_str_mv	10.1103/PhysRevLett.115.027602
format	Article
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source	American Physical Society Journals
subjects	Blocking Correlation Fermi surfaces Helium Ion exchangers Mathematical models Metal surfaces Occupation
title	Spin Blocking in the Correlated Double-Electron Capture from Metal Surfaces
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