Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport in topological insulators with bulk-surface coupling:
  Interference corrections and conductance fluctuations   Motivated by the experimental difficulty to produce topological insulators
(TIs) of the Bi$_2$Se$_3$ family with pure surface-state conduction, we study
the effect that the bulk can have on the low-temperature transport properties
of gated thin TI films. In particular, we focus on interference corrections,
namely weak localization (WL) or weak-antilocalization (WAL), and conductance
fluctuations (CFs) based on an effective low-energy Hamiltonian. Utilizing
diagrammatic perturbation theory we first analyze the bulk and the surface
separately and subsequently discuss WL/WAL and CFs when a tunneling-coupling is
introduced. We identify the relevant soft diffusion modes of the coupled system
and use this insight to make simultaneous predictions for both interference
corrections and conductance fluctuations in various parameter regimes. The
results strongly suggest that the combined measurement of both quantities can
provide an improved understanding of the physics underlying the low-temperature
transport processes in thin TI films with bulk-surface coupling.

2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin