Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Underscreened Kondo effect in quantum dots coupled to ferromagnetic
  leads   We analyze the equilibrium transport properties of underscreened Kondo effect
in the case of a two-level quantum dot coupled to ferromagnetic leads. Using
the numerical renormalization group (NRG) method, we have determined the gate
voltage dependence of the dot's spin and level-resolved spectral functions. We
have shown that the polarization of the dot is very susceptible to spin
imbalance in the leads and changes sign in the middle of the S=1 Coulomb
valley. Furthermore, we have also found that by fine-tuning an external
magnetic field one can compensate for the presence of ferromagnetic leads and
restore the Kondo effect in the case of $S=1/2$ Coulomb valley. However, the
underscreened Kondo effect cannot be fully recovered due to its extreme
sensitivity with respect to the magnetic field.

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The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
2
The categories of this paper are: math
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The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio