Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-Valley Kondo Effect in Multi-electron Silicon Quantum Dots   We study the spin-valley Kondo effect of a silicon quantum dot occupied by $%
\mathcal{N}$ electrons, with $\mathcal{N}$ up to four. We show that the Kondo
resonance appears in the $\mathcal{N}=1,2,3$ Coulomb blockade regimes, but not
in the $\mathcal{N}=4$ one, in contrast to the spin-1/2 Kondo effect, which
only occurs at $\mathcal{N}=$ odd. Assuming large orbital level spacings, the
energy states of the dot can be simply characterized by fourfold spin-valley
degrees of freedom. The density of states (DOS) is obtained as a function of
temperature and applied magnetic field using a finite-U equation-of-motion
approach. The structure in the DOS can be detected in transport experiments.
The Kondo resonance is split by the Zeeman splitting and valley splitting for
double- and triple-electron Si dots, in a similar fashion to single-electron
ones. The peak structure and splitting patterns are much richer for the
spin-valley Kondo effect than for the pure spin Kondo effect.

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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat