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Title: Large intrinsic anomalous Hall effect in SrIrO3 induced by magnetic proximity effect

Journal Article · · Nature Communications
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  1. Univ. Paris-Saclay, Palaiseau (France)
  2. Univ. Complutense Madrid (Spain)
  3. Univ. of Tennessee, Knoxville, TN (United States); Nanjing Univ. (China)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  6. Bryn Mawr College, PA (United States)
  7. Universidad Autonoma, Cantoblanco (Spain). IMDEA Nanoscience Campus; Univ. Complutense Madrid (Spain)
  8. CELLS-ALBA Synchrotron Radiation Facility, Cerdanyola del Valles (Spain)
  9. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  10. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

The anomalous Hall effect (AHE) is an intriguing transport phenomenon occurring typically in ferromagnets as a consequence of broken time reversal symmetry and spin-orbit interaction. It can be caused by two microscopically distinct mechanisms, namely, by skew or side-jump scattering due to chiral features of the disorder scattering, or by an intrinsic contribution directly linked to the topological properties of the Bloch states. Here we show that the AHE can be artificially engineered in materials in which it is originally absent by combining the effects of symmetry breaking, spin orbit interaction and proximity-induced magnetism. In particular, we find a strikingly large AHE that emerges at the interface between a ferromagnetic manganite (La0.7Sr0.3MnO3) and a semimetallic iridate (SrIrO3). It is intrinsic and originates in the proximity-induced magnetism present in the narrow bands of strong spin-orbit coupling material SrIrO3, which yields values of anomalous Hall conductivity and Hall angle as high as those observed in bulk transition-metal ferromagnets. These results demonstrate the interplay between correlated electron physics and topological phenomena at interfaces between 3d ferromagnets and strong spin-orbit coupling 5d oxides and trace an exciting path towards future topological spintronics at oxide interfaces. The anomalous Hall effect (AHE) occurs in ferromagnets caused by intrinsic and extrinsic mechanisms. Here, Yoo et al. report large anomalous Hall conductivity and Hall angle at the interface between a ferromagnet La0.7Sr0.3MnO3 and a semimetallic SrIrO3, due to the interplay between correlated physics and topological phenomena.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; European Research Council (ERC); European Union (EU); Spanish Ministerio de Economia y Competitividad (MINECO); French National Research Agency (ANR); China Scholarship Council; National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; AC02-06CH11357; MAT2017-87134-C02; ANR-11-IDEX-0003-02; 647100; ANR-15-CE24-0008-01; ANR-17-CE24-0026-03; DMR-1708790
OSTI ID:
1797679
Alternate ID(s):
OSTI ID: 1813061
Journal Information:
Nature Communications, Vol. 12, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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