Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pseudogap state in slightly doped by aluminium and praseodymium
  YBa$_2$Cu$_3$O$_{7-\delta}$ single crystals with a given topology of plane
  defects   In present work the conductivity in the basis plane of YBaCuO single crystals
slightly doped by Al and Pr with a pre-specified topology of twin boundaries
has been investigated. The excess conductivity for the analyzed samples shows
dependence like $\Delta\sigma\sim(1-T/T^*)\exp(\Delta_{ab}^*/T)$ in wide
temperature range $T_f<T<T^*$, where $T^*$ can be represents as mean field
temperature of superconducting transition. The temperature dependence of
pseudogap can be satisfactory described in terms of the BCS-BEC crossover
theoretical model.

22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas