Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-assembling two-dimensional quasicrystals in simple systems of
  monodisperse soft-core disks   In previous approaches to form quasicrystals, multiple competing length
scales involved in particle size, shape or interaction potential are believed
to be necessary. It is unexpected that quasicrystals can be self-assembled by
monodisperse, isotropic particles interacting via a simple potential without
multiple length scales. Here we report the surprising finding of the
self-assembly of such quasicrystals in two dimensional systems of soft-core
disks interacting via repulsions. We find not only dodecagonal but also
octagonal quasicrystals, which have not been found yet in soft quasicrystals.
In the self-assembly of such unexpected quasicrystals, particles tend to form
pentagons, which are essential elements to form the quasicrystalline order. Our
findings pave an unexpected and simple way to form quasicrystals and pose a new
challenge for theoretical understanding of quasicrystals.

32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom