Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flux flow of Abrikosov-Josephson vortices along grain boundaries in
  high-temperature superconductors   We show that low-angle grain boundaries (GB) in high-temperature
superconductors exhibit intermediate Abrikosov vortices with Josephson cores,
whose length $l$ along GB is smaller that the London penetration depth, but
larger than the coherence length. We found an exact solution for a periodic
vortex structure moving along GB in a magnetic field $H$ and calculated the
flux flow resistivity $R_F(H)$, and the nonlinear voltage-current
characteristics. The predicted $R_F(H)$ dependence describes well our
experimental data on $7^{\circ}$ unirradiated and irradiated $YBa_2Cu_3O_7$
bicrystals, from which the core size $l(T)$, and the intrinsic depairing
density $J_b(T)$ on nanoscales of few GB dislocations were measured for the
first time. The observed temperature dependence of $J_b(T)=J_{b0}(1-T/T_c)^2$
indicates a significant order parameter suppression in current channels between
GB dislocation cores.

35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas