Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unusually stronger quantum fluctuation with larger spins: Novel
  phenomena revealed by emergent magnetism in pressurized high-temperature
  superconductor FeSe   A counter-intuitive enhancement of quantum fluctuation with larger spins,
together with a few novel physical phenomena, is discovered in studying the
recently observed emergent magnetism in high-temperature superconductor FeSe
under pressure. Starting with experimental crystalline structure from our
high-pressure X-ray refinement, we analyze theoretically the stability of the
magnetically ordered state with a realistic spin-fermion model. We find
surprisingly that in comparison with the magnetically ordered Fe-pnictides, the
larger spins in FeSe suffer even stronger long-range quantum fluctuation that
diminishes their ordering at ambient pressure. This "fail-to-order" quantum
spin liquid state then develops into an ordered state above 1GPa due to
weakened fluctuation accompanying the reduction of anion height and carrier
density. The ordering further benefits from the ferro-orbital order and shows
the observed enhancement around 1GPa. We further clarify the controversial
nature of magnetism and its interplay with nematicity in FeSe in the same
unified picture for all Fe-based superconductors. In addition, the versatile
itinerant carriers produce interesting correlated metal behavior in a large
region of phase space. Our study establishes a generic exceptional paradigm of
stronger quantum fluctuation with larger spins that complements the standard
knowledge of insulating magnetism.

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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex