Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/3572
Título: Quartic lattice interactions, soliton-like excitations, and electron pairing in one-dimensional anharmonic crystals
Autor: Velarde, M. G.
Brizhik, L.
Chetverikov, A. P.
Cruzeiro, Leonor
Ebeling, W.
Röpke, G.
Palavras-chave: Electron pairing
Bisolectron
Anharmonic lattice
Solectron
Data: 5-Jul-2012
Editora: Wiley
Citação: Velarde, M.G.; Brizhik, L.; Chetverikov, A.P.; Cruzeiro, L.; Ebeling, W.; Röpke, G. Quartic lattice interactions, soliton-like excitations, and electron pairing in one-dimensional anharmonic crystals, International Journal of Quantum Chemistry, 112, 13, 2591-2598, 2012.
Resumo: In this study, it is shown that two added, excess electrons with opposite spins in one-dimensional crystal lattices with quartic anharmonicity may form a bisolectron, which is a localized bound state of the paired electrons to a soliton-like lattice deformation. It is also shown that when the Coulomb repulsion is included, the wave function of the bisolectron has two maxima, and such a state is stable in lattices with strong enough electron (phonon/soliton)–lattice coupling. Furthermore, the energy of the bisolectron is shown to be lower than the energy of the state with two separate, independent electrons, as even with account of the Coulomb repulsion the bisolectron binding energy is positive.
Peer review: yes
URI: http://hdl.handle.net/10400.1/3572
DOI: http://dx.doi.org/10.1002/qua.23282
ISSN: 0020-7608
Versão do Editor: http://onlinelibrary.wiley.com/doi/10.1002/qua.23282/abstract
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)

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