Duality Breaking of Vortex Configuration in a Hierarchical Honeycomb Network

Details Duality Breaking of Vortex Configuration in a Hierarchical Honeycomb Network Duality Breaking of Vortex Configuration in a Hierarchical Honeycomb Network

2009-06-19

arxiv.org/abs/0906.3578v4

Phys. Rev. B 80, 094502 (2009)

Physics

Condensed Matter

Superconductivity

12 pages, 6 figures

Scientific paper

10.1103/PhysRevB.80.094502

We report measurements of Little-Parks oscillation on the hierarchical honeycomb-superconducting network for investigating possible effects of hierarchical structure in terms of spatial symmetry, parity and duality. We observed an asymmetric Little-Parks oscillation about $\Phi/\Phi_0 = 1/2$, although spatial symmetry was kept in the network. In comparison with a regular honeycomb network, the asymmetric oscillation is attributed to hierarchy which induces mixture of commensurate and incommensurate regions. The asymmetric oscillation is found to indicate breaking of the duality of vortex configuration.

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