Fractionnally charged excitations in the charge density wave state of a quarter-filled t-J chain with quantum phonons

Details Fractionnally charged excitations in the charge density wave state of a quarter-filled t-J chain with quantum phonons Fractionnally charged excitations in the charge density wave state of a quarter-filled t-J chain with quantum phonons

2000-11-21

arxiv.org/abs/cond-mat/0011358v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1007/s100510170156

Elementary excitations of the 4k$_F$ charge density wave state of a quarter-filled strongly correlated electronic one-dimensional chain are investigated in the presence of dispersionless quantum optical phonons using Density Matrix Renormalization Group techniques. Such excitations are shown to be topological unbound solitons carrying charge $e/2$. Relevance to the 4k$_F$ charge density wave instability in $\rm (DI-DCNQI)_2Ag$ or recently discovered in (TMTTF)$_2$X (X=PF$_6$, AsF$_6$) is discussed.

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