Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant magnetic response of a two-dimensional antiferromagnet   A fundamental difference between antiferromagnets and ferromagnets is the
lack of linear coupling to a uniform magnetic field due to the staggered order
parameter. Such coupling is possible via the Dzyaloshinskii-Moriya (DM)
interaction but at the expense of reduced antiferromagnetic (AFM)
susceptibility due to the canting-induced spin anisotropy. We solve this
long-standing problem with a top-down approach that utilizes spin-orbit
coupling in the presence of a hidden SU(2) symmetry. We demonstrate giant AFM
responses to sub-Tesla external fields by exploiting the extremely strong
two-dimensional critical fluctuations preserved under a symmetry-invariant
exchange anisotropy, which is built into a square-lattice artificially
synthesized as a superlattice of SrIrO3 and SrTiO3. The observed field-induced
logarithmic increase of the ordering temperature enables highly efficient
control of the AFM order. As antiferromagnets promise to afford switching speed
and storage security far beyond ferromagnets, our symmetry-invariant approach
unleashes the great potential of functional antiferromagnets.

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The categories of this paper are: physics
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The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
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The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc