Aharonov-Casher phase and persistent current in a polyacetylene ring

Details Aharonov-Casher phase and persistent current in a polyacetylene ring Aharonov-Casher phase and persistent current in a polyacetylene ring

2001-11-23

arxiv.org/abs/cond-mat/0111446v1

J Phys.: Cond Matt. 13 (2001) 617

Physics

Condensed Matter

12 pages, 5 figures

Scientific paper

10.1088/0953-8984/13/4/308

We investigate a polyacetylene ring in an axially symmetric, static electric field with a modified SSH Hamiltonian of a polyacetylene chain. An effective gauge potential of the single electron Hamiltonian due to spin-field interaction is obtained and it results in a Fr\"{o}hlich's type of superconductivity equivalent to the effect of travelling lattice wave. The total energy as well as the persistent current density are shown to be a periodic function of the flux of the gauge field embraced by the polyacetylene ring.

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