Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tuning Magnetic Coupling in Sr$_2$IrO$_4$ Thin Films with Epitaxial
  Strain   We report x-ray resonant magnetic scattering (XRMS) and resonant inelastic
x-ray scattering (RIXS) studies of epitaxially-strained $\mathrm{Sr_2IrO_4}$
thin films. The films were grown on $\mathrm{SrTiO_3}$ and
$\mathrm{(LaAlO_3)_{0.3}(Sr_2AlTaO_6)_{0.7}}$ substrates, under slight tensile
and compressive strains, respectively. Although the films develop a magnetic
structure reminiscent of bulk $\mathrm{Sr_2IrO_4}$, the magnetic correlations
are extremely anisotropic, with in-plane correlation lengths significantly
longer than the out-of-plane correlation lengths. In addition, the compressive
(tensile) strain serves to suppress (enhance) the magnetic ordering temperature
$\mathrm{T_N}$, while raising (lowering) the energy of the zone boundary
magnon. Quantum chemical calculations show that the tuning of magnetic energy
scales can be understood in terms of strain-induced change in bond lengths.

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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
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The categories of this paper are: stat
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci