Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Oxygen Vacancy-Induced Topological Hall effect in a Nonmagnetic Band
  Insulator   The discovery of skyrmions has sparked tremendous interests about
topologically nontrivial spin textures in recent times. The signature of
noncoplanar nature of magnetic moments can be observed as topological Hall
effect (THE) in electrical measurement. Realization of such nontrivial spin
textures in new materials and through new routes is an ongoing endeavour due to
their huge potential for future ultra-dense low-power memory applications. In
this work, we report oxygen vacancy (OV) induced THE and anomalous Hall effect
(AHE) in a 5$d^0$ system KTaO$_3$. The observation of weak antilocalization
behavior and THE in the same temperature range strongly implies the crucial
role of spin-orbit coupling (SOC) behind the origin of THE. Ab initio
calculations reveal the formation of the magnetic moment on Ta atoms around the
OV and Rashba-type spin texturing of conduction electrons. In the presence of
Rashba SOC, the local moments around vacancy can form bound magnetic polarons
(BMP) with noncollinear spin texture, resulting THE. Scaling analysis between
transverse and longitudinal resistance establishes skew scattering driven AHE
in present case. Our study opens a route to realize topological phenomena
through defect engineering.

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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: econ
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
19
The categories of this paper are: eess
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The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: nlin
20
The categories of this paper are: acc-phys