Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr2IrO4   Spin-orbit entangled magnetic dipoles, often referred to as pseudospins,
provide a new avenue to explore novel magnetism inconceivable in the weak
spin-orbit coupling limit, but the nature of their low-energy interactions
remains to be understood. We present a comprehensive study of the static
magnetism and low-energy pseudospin dynamics in the archetypal spin-orbit Mott
insulator Sr2IrO4. We find that in order to understand even basic magnetization
measurements, a formerly overlooked in-plane anisotropy is fundamental. In
addition to magnetometry, we use neutron diffraction, inelastic neutron
scattering and resonant elastic and inelastic x-ray scattering to identify and
quantify the interactions that determine the global symmetry of the system and
govern the linear responses of pseudospins to external magnetic felds and their
low-energy dynamics. We find that a pseudospin-only Hamiltonian is insufficient
for an accurate description of the magnetism in Sr2IrO4 and that
pseudospin-lattice coupling is essential. This finding should be generally
applicable to other pseudospin systems with sizable orbital moments sensitive
to anisotropic crystalline environments.

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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
3
The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph