Bohsung, JörgTrebin, Hans-Rainer2016-02-112016-03-312016-02-112016-03-311987455691312http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-105131http://elib.uni-stuttgart.de/handle/11682/5229http://dx.doi.org/10.18419/opus-5212The most significant feature in the transition from the quasicrystalline to the amorphous state is the loss of long-range bond-orientational order. Disclinations are candidates for elementary excitations which destroy angular correlations. Generalizing the topological defect classification, we investigate point singularities in two-dimensional pentagonal quasicrystals and construct disclinations, dislocations, and disclination dipoles.eninfo:eu-repo/semantics/openAccessFlüssigkristall , Gitterbaufehler , Quasikristall530article