Physics – Mathematical Physics
Scientific paper
2005-09-18
Philosophical Magazine 86 (2006) 567-572
Physics
Mathematical Physics
6 pages
Scientific paper
10.1080/14786430500269022
We consider averaged shelling and coordination numbers of aperiodic tilings. Shelling numbers count the vertices on radial shells around a vertex. Coordination numbers, in turn, count the vertices on coordination shells of a vertex, defined via the graph distance given by the tiling. For the Ammann-Beenker tiling, we find that coordination shells consist of complete shelling orbits, which enables us to calculate averaged coordination numbers for rather large distances explicitly. The relation to topological invariants of tilings is briefly discussed.
Baake Michael
Grimm Uwe
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