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• W4293462394 abstract "Antiferromagnetic (AFM) pyrochlore iridates are a fertile ground to hunt for a Weyl semimetallic state characterized by a linear crossing of two nondegenerate bands near the Fermi level ${E}_{F}$. Here, we demonstrate evidence of low-temperature anomalous and topological Hall effects in an antiferromagnetic ${mathrm{Eu}}_{2}{mathrm{Ir}}_{2}{mathrm{O}}_{7}$(111) epitaxial thin film. The observed anomalous Hall effect is explained in terms of the momentum space Berry curvature associated with the Weyl nodes in the electronic band structure. The topological Hall effect reaches a large value ${ensuremath{rho}}_{xy}^{text{THE}}phantom{rule{4pt}{0ex}}ensuremath{sim}10phantom{rule{4pt}{0ex}}ensuremath{mu}mathrm{ensuremath{Omega}}phantom{rule{0.16em}{0ex}}text{cm}$ at 2 K. The topological nature of the Hall effect is attributed to the nonzero scalar spin chirality of the all-in-all-out/all-out-all-in (AIAO/AOAI) type noncoplanar AFM spin structure. The magnetoresistance (MR) shows a prominent negative variation ($mathrm{MR}ensuremath{sim}10%$ at 2 K) below 10 K. The field dependence of MR below 5 K varies quadratically in the low-field regime, and above 40 kOe it shows a linear trend. The quadratic to linear crossover of the MR is explained by the field-induced ($H$) spin canting (spin chirality) of the static spins in the AIAO/AOAI spin structure. In the intermediate-temperature region MR of $15ensuremath{-}25$ K exhibits a hysteretic response which is associated with field-induced domain switching of the AIAO/AOAI spin structure. This work highlights the interplay of magnetism and topology in a spin-orbit-coupled correlated electron system and unravels the possibility for realizing the Weyl phase in antiferromagnetic ${mathrm{Eu}}_{2}{mathrm{Ir}}_{2}{mathrm{O}}_{7}$(111) thin films." @default.
• W4293462394 created "2022-08-29" @default.
• W4293462394 creator A5026080737 @default.
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• W4293462394 date "2022-08-29" @default.
• W4293462394 modified "2023-10-11" @default.
• W4293462394 title "Spin chirality induced large topological Hall effect in magnetic Weyl semimetallic <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi mathvariant=normal>Eu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>Ir</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>7</mml:mn></mml:msub></mml:math> (111) thin films" @default.
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• W4293462394 doi "https://doi.org/10.1103/physrevb.106.085139" @default.
• W4293462394 hasPublicationYear "2022" @default.
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