Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: In-plane chemical pressure essential for superconductivity in
  BiCh2-based (Ch: S, Se) layered structure   BiCh2-based superconductors (Ch: S, Se) are a new series of layered
superconductor. However, mechanisms for the emergence of superconductivity in
BiCh2-based superconductors have not been clarified. In this study, we have
investigated crystal structure of two series of optimally-doped BiCh2-based
superconductors, Ce1-xNdxO0.5F0.5BiS2 and LaO0.5F0.5Bi(S1-ySey)2, using powder
synchrotron x-ray diffraction in order to reveal the relationship between
crystal structure and superconducting properties of the BiCh2-based family. We
have found that an enhancement of in-plane chemical pressure would commonly
induce bulk superconductivity in both systems. Furthermore, we have revealed
that superconducting transition temperature for REO0.5F0.5BiCh2 superconductors
could universally be determined by degree of in-plane chemical pressure.

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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: q-fin
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph