Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear Spin Polarized Transport Through a Quantum Dot   We present a theoretical analysis of the nonlinear bias and temperature
dependence of current-voltage characteristics of a spin-valve device which is
formed by connecting a quantum dot to two ferromagnetic electrodes whose
magnetic moments orient at an angle $\theta$ with respect to each other. The
theory is based on nonequilibrium Green's function approach and focused on
current perpendicular to plane geometry. Coulomb interaction has been taken
into account explicitly at the Hartree level. We derive a formula in closed
form for current flowing through the device in general terms of bias and
temperature. In the wideband limit we report exact results for the TMR junction
nonlinear I-V curve as a function of $\theta$. We also report the conductance
slope at zero bias as a function of temperature for which experimental results
reported an anomalous behavior.

26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th