Fractional charge excitations in fermionic ladders
classification
❄️ cond-mat.str-el
keywords
chargeexcitationsbondcarrycasesdensityelectronelementary
read the original abstract
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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