Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport properties of a $3$-dimensional holographic effective theory
  with gauge-axion coupling   In this paper, we implement a $3$-dimensional holographic effective theory
with gauge-axion coupling. The analytical black hole solution is worked out. We
investigate the Direct current (DC) thermoelectric conductivities. A novel
property is that DC electric conductivity for vanishing gauge-axion coupling is
temperature dependent. It is different from that of $4$-dimensional axion model
whose DC electric conductivity is temperature independent. In addition, the
gauge-axion coupling induces a metal insulator transition (MIT) at zero
temperature. The properties of other DC thermoelectric conductivities are also
discussed. Moreover we find that the Wiedemann-Franz (WF) law is violated in
our model.

36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga