Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Colossal resistivity change besides magnetoresistance: an extended
  theoretical framework for electronic transport of manganites   Current theoretical approaches to manganites mainly stem from magnetic
framework, in which the electronic transport is thought to be spin-dependent
and the double exchange mechanism plays a core role. However, quite a number of
experimental observations can yet not be reasonably explained. For example,
multiplicate insulator-metal transitions and resistivity reduction induced by
perturbations other than magnetic field, such as electric current, are not well
understood. A comprehensive analysis on earlier extensive studies is performed
and two types of origins for resistivity change are highlighted. Besides the
insulated-to-metallic transition induced by external field such as magnetic
field, the insulated-to-insulated transition induced extrinsically is even a
more important source for the colossal resistivity change. We propose an
extended framework for the electronic transport of manganites, in which the
contribution of charge degree of freedom is given a special priority.

17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph