Influence of Long-Range Coulomb Forces and Dissipation on the Persistent Current of a Wigner Crystal-Ring

Details Influence of Long-Range Coulomb Forces and Dissipation on the Persistent Current of a Wigner Crystal-Ring Influence of Long-Range Coulomb Forces and Dissipation on the Persistent Current of a Wigner Crystal-Ring

1994-07-05

arxiv.org/abs/cond-mat/9407023v1

Physics

Condensed Matter

13 pages, LaTeX 3.14t3 with RevTeX 3.0, G{\"o}teborg preprint APR 94-34

Scientific paper

The influence of long-range Coulomb forces on the persistent current of a pinned Wigner crystal-ring is considered. A simple method is proposed for how to take into account Coulomb effects for the macroscopic quantum tunneling of the Wigner crystal. It is shown that unscreened Coulomb interactions increase the stiffness of the Wigner lattice. This leads to additional suppression of the amplitude of Aharonov-Bohm oscillations, but makes the predicted anomalous temperature dependence of the persistent current more pronounced. The impact of dissipation on the persistent current of a Wigner crystal-ring is also studied.

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