Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large upper critical field in non-centrosymmetric superconductor Y2C3   We determine the upper critical field $\mu_0 H_{c2}(T_c)$ of
non-centrosymmetric superconductor $Y_2 C_3$ using two distinct methods: the
bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance
measurements. It is found that the upper critical field reaches a value of 30T
at zero temperature which is above the weak-coupling Pauli paramagnetic limit.
We argue that the observation of such a large $\mu_0 H_{c2}(0)$ in $Y_2 C_3$
could be attributed to the admixture of spin-singlet and spin-triplet pairing
states as a result of broken inversion symmetry.

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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph