Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A density functional study of pressure induced superconductivity in P
  and its implication for spintronics   The stability of high-pressure phases of P has been studied using density
functional theory and the local density approximation. Using a linear response
technique, we have calculated the phonon spectrum and electron-phonon
interaction for bcc P and predict it to be superconducting with $T_c$ of 19 K.
We propose that this phase might be realized in epitaxial thin films using
templates such as V(100), Fe(100) or Cr(100) relevant to spintronics
applications.

36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ