Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coulomb Effects on Electron Transport and Shot Noise in Hybrid
  Normal-Superconducting Metallic Structures   We analyze the effect of electron-electron interactions on Andreev current
and shot noise in diffusive hybrid structures composed of a normal metal
attached to a superconductor via a weakly transmitting interface. We
demonstrate that at voltages/temperatures below the Thouless energy of a normal
metal Coulomb interaction yields a reduction of both Andreev current and its
noise by a constant factor which essentially depends on the system
dimensionality. For quasi-1d structures this factor is $\sim N_{\rm Ch}^{8/g}$,
where $N_{\rm Ch}$ and $g$ are respectively the number of conducting channels
and dimensionless conductance of a normal metal. At voltages above the Thouless
energy the interaction correction to Andreev current and shot noise acquires an
additional voltage dependence which turns out to be a power-law in the quasi-1d
limit.

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The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
18
The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci