Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarized currents in Coulomb blockade and Kondo regimes without
  magnetic fields   We present studies of the Coulomb blockade and Kondo regimes of transport
through a quantum dot connected to current leads through spin-polarizing
quantum point contacts (QPCs). This structure, arising from the effect of
lateral spin-orbit fields defining the QPCs, results in spin-polarized currents
even in the absence of external magnetic fields and greatly affects the
correlations in the dot. Using equation-of-motion and numerical renormalization
group calculations we obtain the conductance and spin polarization for this
system under different parameter regimes. We find that the system exhibits
spin-polarized conductance in both the Coulomb blockade and Kondo regimes, all
in the absence of applied magnetic fields. We analyze the role that the
spin-dependent tunneling amplitudes of the QPC play in determining the charge
and net magnetic moment in the dot. These effects, controllable by lateral gate
voltages, may provide an alternative approach for exploring Kondo correlations,
as well as possible spin devices

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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an