Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Transport in Magnetic Topological Insulator Thin Films   The experimental observation of the long-sought quantum anomalous Hall effect
was recently reported in magnetically doped topological insulator thin films
[Chang et al., Science 340, 167 (2013)]. An intriguing observation is a rapid
decrease from the quantized plateau in the Hall conductance, accompanied by a
peak in the longitudinal conductance as a function of the gate voltage. Here,
we present a quantum transport theory with an effective model for magnetic
topological insulator thin films. The good agreement between theory and
experiment reveals that the measured transport originates from a topologically
nontrivial conduction band which, near its band edge, has concentrated Berry
curvature and a local maximum in group velocity. The indispensable roles of the
broken structure inversion and particle-hole symmetries are also revealed. The
results are instructive for future experiments and transport studies based on
first-principles calculations.

16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph