Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Glassy Transition in the Vortex Lattice of Ba(Fe0.93Rh0.07)2As2
  superconductor, probed by NMR and ac-susceptibility   By using Nuclear Magnetic Resonance and ac-susceptibility, the characteristic
correlation times for the vortex dynamics, in an iron-based superconductor,
have been derived. Upon cooling, the vortex dynamics displays a crossover
consistent with a vortex glass transition. The correlation times, in the fast
motions regime, merge onto a universal curve which is fit by the Vogel-Fulcher
law, rather than by an Arrhenius law. Moreover, the pinning barrier shows a
weak dependence on the magnetic field which can be heuristically justified
within a fragile glass scenario. In addition, the glass freezing temperatures
obtained by the two techniques merge onto the de Almeida-Thouless line. Finally
the phase diagram for the mixed phase has been derived.

14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th