Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Itinerancy enhanced quantum fluctuation of magnetic moments in
  iron-based superconductors   We investigate the influence of itinerant carriers on dynamics and
fluctuation of local moments in Fe-based superconductors, via linear spin-wave
analysis of a spin-fermion model containing both itinerant and local degrees of
freedom. Surprisingly against the common lore, instead of enhancing the
($\pi$,0) order, itinerant carriers with well nested Fermi surfaces is found to
induce significant amount of \textit{spatial} and temporal quantum fluctuation
that leads to the observed small ordered moment. Interestingly, the underlying
mechanism is shown to be intra-pocket nesting-associated long-range coupling,
rather than the previously believed ferromagnetic double-exchange effect. This
challenges the validity of ferromagnetically compensated first-neighbor
coupling reported from short-range fitting to the experimental dispersion,
which turns out to result instead from the ferro-orbital order that is also
found instrumental in stabilizing the magnetic order.

10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat