Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of electronic correlations and magnetic field on a molecular
  ring out of equilibrium   We study effects of electron-electron interactions on the steady-state
characteristics of a hexagonal molecular ring in a magnetic field, as a model
for a benzene molecular junction. The system is driven out of equilibrium by
applying a bias voltage across two metallic leads. We employ a model
Hamiltonian approach to evaluate the effects of on-site as well as
nearest-neighbour density-density type interactions in a physically relevant
parameter regime. Results for the steady-state current, charge density and
magnetization in three different junction setups (para, meta and ortho) are
presented. Our findings indicate that interactions beyond the mean-field level
renormalize voltage thresholds as well as current plateaus. Electron-electron
interactions lead to substantial charge redistribution as compared to the
mean-field results. We identify a strong response of the circular current on
the electronic structure of the metallic leads. Our results are obtained by
steady-state Cluster Perturbation Theory, a systematically improvable
approximation to study interacting molecular junctions out of equilibrium, even
in magnetic fields. Within this framework general expressions for the current,
charge density and magnetization in the steady-state are derived. The method is
flexible and fast and can straight-forwardly be applied to effective models as
obtained from ab-initio calculations.

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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
1
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: physics
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The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: math-ph