Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ferroelectric 180 degree walls are mechanically softer than the domains
  they separate   Domain walls are functionally different from the domains they separate, but
little is known about their mechanical properties. Using scanning probe
microscopy, we have measured the mechanical response of ferroelectric 180o
domain walls and observed that, despite separating domains that are
mechanically identical (non-ferroelastic), the walls are mechanically distinct
-- softer -- compared to the domains. This effect has been observed in
different ferroelectric materials (LiNbO3, BaTiO3, PbTiO3) and with different
morphologies (from single crystals to thin films) so it appears to be
universal. We propose a theoretical framework that explains the domain wall
softening and justifies that the effect should be common to all ferroelectrics.

24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ