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<p>Two-dimensional electrons formed at the heterointerfaces of transition metal oxides have been the focus of intensive studies in condensed matter physics since their discovery at LaAlO<sub>3</sub>/SrTiO<sub>3</sub>. In particular, various attempts have been made to integrate magnetic properties with such two-dimensional electrons, aiming at exploring spintronic functions. Here we demonstrate a novel approach to realize the spin-polarized two-dimensional electron system at the LaAlO<sub>3</sub>/SrTiO<sub>3</sub> interface by the proximity effect of emergent magnetic fields from adjacent DyFeO<sub>3</sub>. We observed an unconventional anomalous Hall effect with a remarkable Hall angle of ~20%, resulting from the combination of high-mobility carriers in LaAlO<sub>3</sub>/SrTiO<sub>3</sub> and the emergent magnetic fields from non-coplanar canted antiferromagnetic spin textures in DyFeO<sub>3</sub>. These findings demonstrate a viable route toward oxide‑based spintronic functionalities by exploiting proximity‑induced emergent fields in two‑dimensional electron systems.</p>

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Giant unconventional Hall effect in DyFeO3/LaAlO3/SrTiO3 two-dimensional electron system via proximity-induced emergent field

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  • 发表日期：

    2025年12月17日

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  • Lingfei Zhang,
  • Takahiro C. Fujita,
  • Masashi Kawasaki

摘要

Two-dimensional electrons formed at the heterointerfaces of transition metal oxides have been the focus of intensive studies in condensed matter physics since their discovery at LaAlO3/SrTiO3. In particular, various attempts have been made to integrate magnetic properties with such two-dimensional electrons, aiming at exploring spintronic functions. Here we demonstrate a novel approach to realize the spin-polarized two-dimensional electron system at the LaAlO3/SrTiO3 interface by the proximity effect of emergent magnetic fields from adjacent DyFeO3. We observed an unconventional anomalous Hall effect with a remarkable Hall angle of ~20%, resulting from the combination of high-mobility carriers in LaAlO3/SrTiO3 and the emergent magnetic fields from non-coplanar canted antiferromagnetic spin textures in DyFeO3. These findings demonstrate a viable route toward oxide‑based spintronic functionalities by exploiting proximity‑induced emergent fields in two‑dimensional electron systems.