Quartic Lattice Interactions, Soliton-like Excitations and Electron Pairing in One-Dimensional Anharmonic Crystals

Autor:	Velarde, M. G., Brizhik, L., Chetverikov, A. P., Cruzeiro, L., Ebeling, W., Röpke, G.
Rok vydání:	2011
Předmět:	Condensed Matter - Strongly Correlated Electrons Nonlinear Sciences - Pattern Formation and Solitons
Druh dokumentu:	Working Paper
Popis:	We show 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
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1109.3992 Zobrazit plný text záznamu View this record from Arxiv