Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The origin of the unusual anisotropic electrical conductivity of
  Ba3Al2As4   Ba3Al2As4 exhibits an unusual anisotropic electrical conductivity, that is,
the electrical conductivity along the chain is smaller than those along other
two directions which conflicts previous conclusion. Earlier studies on Ca5M2Pn6
showed a high electrical conductivity along the chain. The band decomposed
charge density is used to explain such unusual behavior. The results indicate
that the existence of a conductive pathway near the Fermi level is responsible
for the electrons transport. Further, the Ba-As bonding of Ba3Al2As4 is some
degree covalency which is novel for the Zintl compounds.

10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin