Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric Field Induced Converse Piezoeffect in Screw Dislocated YBCO
  Thin Films   A possible scenario for electric-field induced critical current enhancement
in screw dislocated YBCO thin films is proposed based on the converse
piezoelectric effect originated from a heavily defected medium of the
superconducting films in an applied electric field. The magnitude of the effect
is found to depend concurrently on the film thickness and the number of
dislocations inside a superconductor.

8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph