Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport through (Ga,Mn)As nanoislands: Coulomb-blockade and
  temperature dependence of the conductance   We report on magnetotransport measurements of nanoconstricted (Ga,Mn)As
devices showing very large resistance changes that can be controlled by both an
electric and a magnetic field. Based on the bias voltage and temperature
dependent measurements down to the millikelvin range we compare the models
currently used to describe transport through (Ga,Mn)As nanoconstrictions. We
provide an explanation for the observed spin-valve like behavior during a
magnetic field sweep by means of the magnetization configurations in the
device. Furthermore, we prove that Coulomb-blockade plays a decisive role for
the transport mechanism and show that modeling the constriction as a granular
metal describes the temperature and bias dependence of the conductance
correctly and allows to estimate the number of participating islands located in
the constriction.

20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th