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Metamaterials, composed of structural building blocks, derive their effective properties from the structure, rather than from their constituent materials they are built from. By designing and analysing a mechanical unstable metamaterial, the potentials given by structural instabilities are investigated. Furthermore the possibilities in modelling the stability behaviour and the effective properties of such materials on the different length-scales are intensively discussed throughout this work.
microstructured materials --- Metamaterialien --- höhere Kontinuumsmechanik --- homogenization --- Homogenisierung --- metamaterials --- Instabilitäten --- instabilities --- Mikrostrukturierte Materialien --- higher continua
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This thesis presents a novel approach to the experimental realization of tunable, superconducting metamaterials. Therefore, conventional resonant meta-atoms are replaced by meta-atoms that contain Josephson junctions, which renders their resonance frequency tunable by an external magnetic field. This tunability is theoretically and experimentally investigated in one-dimensional magnetic and electric metamaterials. For the magnetic metamaterial, the effective, magnetic permeability is determined.
microwaves --- Metamaterialien --- Festkörperphysik --- low temperature physics --- solid state physics --- Tieftemperaturphysiksuperconductivity --- metamaterials --- Mikrowellen --- Supraleitung
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