Fractional charge excitations in fermionic ladders

Details Fractional charge excitations in fermionic ladders Fractional charge excitations in fermionic ladders

2004-07-22

arxiv.org/abs/cond-mat/0407593v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.71.161101

The system of interacting spinless fermions hopping on a two-leg ladder in
the presence of an external magnetic field is shown to possess a long range
order: the bond density wave or the staggered flux phase. In both cases the
elementary excitations are $Z_2$ kinks and carry one half the charge of an
electron.

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