Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parallel Hall effect from 3D single-component metamaterials   We propose a class of three-dimensional metamaterial architectures composed
of a single doped semiconductor (e.g., n-Si) in air or vacuum that lead to
unusual effective behavior of the classical Hall effect. Using an anisotropic
structure, we numerically demonstrate a Hall voltage that is parallel---rather
than orthogonal---to the external static magnetic-field vector ("parallel Hall
effect"). The sign of this parallel Hall voltage can be determined by a
structure parameter. Together with the previously demonstrated positive or
negative orthogonal Hall voltage, we demonstrate four different sign
combinations

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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
2
The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin