Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-monotonic dynamic correlations beneath the surface of glass-forming
  liquids   Collective motion over increasing length scales is a signature of the
vitrification process of liquids. We demonstrate the emergence of distinct
static and dynamic length scales probed near the free surface in fully
equilibrated glass-forming liquid films, and their connection to the bulk
properties of the system. In contrast to a monotonically growing static
correlation length, the dynamic correlation length that measures the extent of
surface-dynamics acceleration into the bulk, displays a striking non-monotonic
temperature evolution that is robust also against changes in detailed
interatomic interaction. The maximum of dynamic correlations defines a
cross-over temperature $T_*$ that we show to agree with a morphological change
of cooperative rearrangement regions (CRR) of fast particles in the bulk
liquids. The cross-over occurs at a temperature larger than the critical
temperature Tc of mode-coupling theory (MCT). We link it to the point where
fast-particle motion decouples from structural relaxation that can be defined
rigorously within a recent extension of MCT, the stochastic $\beta$-relaxation
theory (SBR).

30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
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
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph