Frustration phenomena in Josephson junction arrays on a dice lattice
arXiv:cond-mat/0510033 · doi:10.1016/j.physc.2005.12.090
Abstract
AC magnetoimpedance measurements performed on proximity-effect coupled Josephson junction arrays on a dice lattice reveal unconventional behaviour resulting from the interplay between the frustration f created by the applied magnetic field and the particular geometry of the system. While the inverse magnetoinductance exhibits prominent peaks at f=1/3 and at f=1/6 (and weaker structures at f=1/9,2/9,1/12,...) reflecting vortex states with a high degree of superconducting phase coherence, the deep minimum at f=1/2 points to a state in which the phase coherence is strongly suppressed. These observations are discussed at the light of recent theoretical work in which the concept of accidental degeneracy plays a central role.
To be published in Physica C
References in corpus (7)
- Aharonov-Bohm cages in two-dimensional structures
- Magnetic field induced localization in a two-dimensional superconducting wire network
- Vortex ordering in fully-frustrated superconducting systems with dice lattice
- Fluctuation induced vortex pattern and its disordering in the fully frustrated XY model on a dice lattice
- Uniformly frustrated XY model without vortex-pattern ordering
- Structure of the superconducting state in a fully frustrated wire network with dice lattice geometry
- Collective pinning of a frozen vortex liquid in ultrathin superconducting YBa_2Cu_3O_7 films
Cited by in corpus (9)
- Artificial flat band systems: from lattice models to experiments
- Realization of all-band-flat photonic lattices
- Quench dynamics of quantum spin models with flat bands of excitations
- Coherent transport in Josephson-Junction rhombi chain with quenched disorder
- Order-by-Disorder Degeneracy Lifting of Interacting Bosons on the Dice Lattice
- Dynamical reentrance and geometry imposed quantization effects in Nb-AlOx-Nb Josephson junction arrays
- Manifestation of geometric resonance in current dependence of AC susceptibility for unshunted array of Nb-AlOx-Nb Josephson junctions
- Novel magnetoinductance effects in Josephson Junction Arrays: A single-plaquette approximation
- Magnetic screening in proximity effect Josephson-junction arrays