Charge-transfer excitations on a linear chain
- 15 August 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (8) , 3829-3834
- https://doi.org/10.1103/physrevb.44.3829
Abstract
One– and two–electron-hole-pair excitations are calculated for a finite chain by means of a generalized Bethe ansatz. It is shown that the static Coulomb interaction between correlated pairs reduces the respective bandwidth as compared to the single-pair excitation. The influence of single-particle overlap is discussed.Keywords
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