Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonreciprocal current in noncentrosymmetric Rashba superconductors   Noncentrosymmetric superconductors with broken inversion symmetry $P$ offer
rich physical phenomena such as the upper critical magnetic field $H_{c2}$
beyond the Pauli limit and magnetoelectric effect. The relativistic spin-orbit
interaction (SOI) plays an essential role in these novel phenomena, which lifts
the Kramers degeneracy at each $\mathbf{k}$-point, and leads to the mixing of
the spin singlet-even parity and spin triplet odd-parity parings. On the other
hand, the time-reversal symmetry $T$ relates the two states at $\mathbf{k}$ and
$-\mathbf{k}$ points with the opposite spins, and the external magnetic field
$B$ further breaking $T$ leads to the directional dependence of the nonlinear
resistivity called magnetochiral anisotropy (MCA). Here we demonstrate
theoretically that the two-component nature of the order parameter, i.e., even
and odd pairings, leads to the gigantic enhancement of the MCA in the
fluctuation region, in Rashba superconductor as a representative example of
noncentrosymmetric system. This reveals the superconducting analogue of
"ferroelectric" appearing in the transport phenomena.

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The categories of this paper are: math-ph
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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: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
2
The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol