Topological Confinement of Spins and Charges: Spinons as pi-junctions

Details Topological Confinement of Spins and Charges: Spinons as pi-junctions Topological Confinement of Spins and Charges: Spinons as pi-junctions

2002-04-05

arxiv.org/abs/cond-mat/0204147v1

Proceedings of the Moriond meeting "Electronic Correlations: From meso- to nano-physics", T. Martin and G. Montambaux eds., ED

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 figures

Scientific paper

Topologically nontrivial states, the solitons, emerge as elementary excitations in 1D electronic systems. In a quasi 1D material the topological requirements originate the spin- or charge- roton like excitations with charge- or spin- kinks localized in the core. They result from the spin-charge recombination due to confinement and the combined symmetry. The rotons possess semi-integer winding numbers which may be relevant to configurations discussed in connection to quantum computing schemes. Practically important is the case of the spinon functioning as the single electronic pi- junction in a quasi 1D superconducting material.

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