Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple Antiferromagnetic Spin Fluctuations and Novel Evolution of Tc
  in Iron-based superconductors LaFe(As1-xPx)(O1-yFy) revealed by 31P-NMR
  Studies   We report on 31P-NMR studies of LaFe(As_{1-x}P_x)(O_{1-y}F_{y}) over wide
compositions for 0<x<1 and 0<y<0.14, which provide clear evidence that
antiferromagnetic spin fluctuations (AFMSFs) are one of the indispensable
elements for enhancing Tc. Systematic 31P-NMR measurements revealed two types
of AFMSFs in the temperature evolution, that is, one is the AFMSFs that develop
rapidly down to Tc with low-energy characteristics, and the other, with
relatively higher energy than the former, develops gradually upon cooling from
high temperature. The low-energy AFMSFs in low y (electron doping) over a wide
x (pnictogen height suppression) range are associated with the two orbitals of
d_{xz/yz}, whereas the higher-energy ones for a wide y region around low x
originate from the three orbitals of d_{xy} and d_{xz/yz}. We remark that the
nonmonotonic variation of Tc as a function of x and y in
LaFe(As_{1-x}P_x)(O_{1-y}F_y) is attributed to these multiple AFMSFs
originating from degenerated multiple 3d orbitals inherent to Fe-pnictide
superconductors.

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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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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: adap-org
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The categories of this paper are: physics
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The categories of this paper are: hep-lat