The electronic structure of linear Beryllium chains %(in particular, Be$_5$ and Be$_{10}$) has been theoretically studied by using {it ab initio} methods. It turns out that, for internuclear distances close to the equilibrium structure, two partially filled edge orbitals (``end states'') localize at the chain ends. This gives rise to two low-lying states, a singlet ground state, $^1Sigma_g$, and a quasi-degenerated triplet, $^3Sigma_u$. The energy splitting goes rapidly to zero as the number of atoms in the chain is increased. Preliminary investigations indicate that this could be a general behavior shared by the metals belonging to the Groups 2 and 12.

A. Monari, V. Vetere, G.L. Bendazzoli, S.Evangelisti, B. Paulus (2008). End states and singlet triplet degeneracy in linear atomic chains. CHEMICAL PHYSICS LETTERS, 465, 102-105 [10.1016/j.cplett.2008.09.059].

End states and singlet triplet degeneracy in linear atomic chains

MONARI, ANTONIO;BENDAZZOLI, GIAN LUIGI;
2008

Abstract

The electronic structure of linear Beryllium chains %(in particular, Be$_5$ and Be$_{10}$) has been theoretically studied by using {it ab initio} methods. It turns out that, for internuclear distances close to the equilibrium structure, two partially filled edge orbitals (``end states'') localize at the chain ends. This gives rise to two low-lying states, a singlet ground state, $^1Sigma_g$, and a quasi-degenerated triplet, $^3Sigma_u$. The energy splitting goes rapidly to zero as the number of atoms in the chain is increased. Preliminary investigations indicate that this could be a general behavior shared by the metals belonging to the Groups 2 and 12.
2008
A. Monari, V. Vetere, G.L. Bendazzoli, S.Evangelisti, B. Paulus (2008). End states and singlet triplet degeneracy in linear atomic chains. CHEMICAL PHYSICS LETTERS, 465, 102-105 [10.1016/j.cplett.2008.09.059].
A. Monari; V. Vetere; G.L. Bendazzoli; S.Evangelisti; B. Paulus
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/62369
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