Giant tunable topological Hall effect in La0.7Sr0.3MnO3/SrIrO3 bilayers
Abstract
The topological Hall effect (THE) arises from a Berry phase imprinted on conduction electron spins as they traverse noncollinear magnetic textures. It constitutes a transport hallmark of chiral magnetism. Very large THE signals are theoretically expected in oxide heterostructures combining 3d or 4d ferromagnets and 5d metals with strong spin–orbit coupling. However, experimental realizations have so far yielded only modest signals whose emergence could not be linked to any chiral magnetic texture. Using ultrathin La₀.₇Sr₀.₃MnO₃/SrIrO₃ bilayers, here we demonstrate a THE that can be switched ON and OFF by the magnetic history, and we establish a direct one-to-one correspondence between the transport anomaly and the emergence—or disappearance—of a chiral magnetic texture at the interface. Further, the associated THE signal is giant, reaching values an order of magnitude larger than observed earlier in analogous systems. Beyond providing a rare, unequivocal evidence for a pure THE, the controllable link between magnetic chirality and the giant Hall signal at oxide interfaces shows a path for engineering reconfigurable conspicuous topological responses, which could impact spintronic sensing and beyond. The topological Hall effect is a key transport signature of chiral magnetism, yet experimental realizations in oxide heterostructures have been limited. Here, the authors use ultrathin La₀.₇Sr₀.₃MnO₃/SrIrO₃ bilayers to demonstrate a switchable, giant topological Hall effect linked to chiral magnetic textures, paving the way for advanced spintronic applications
Related
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- Engineering tunable p-wave magnetism in antiferromagnetic bilayers
- Symmetry Breaking and Transition to robust excitonic topological order in InAs/GaSb bilayers
- Topological properties and gap structure of the paired state in twisted TMD bilayers within a two-band effective model
- Interlayer Phase Locking and Sliding Select Topological Melting Channels in Superconducting Bilayers
BibTeX
@article{peraltasomoza2026giant,
title = {{Giant tunable topological Hall effect in La0.7Sr0.3MnO3/SrIrO3 bilayers}},
author = {Andrea Peralta-Somoza and Sandra Lopez and Rafael Fuster and Fernando Gallego and Sergio Valencia and Juan Riquelme and Mariona Cabero and Javier Tornos and Carmen Munuera and Federico Mompeán and Mar García-Hernández and Timothy Charlton and Brian Kirby and Stephan Rosenkranz and Zouhair Sefrioui and Javier Villegas and Suzanne Te Velthuis and Carlos León and Jacobo Santamaría},
journal = {Communications Materials},
year = {2026},
month = jun,
doi = {10.1038/s43246-026-01255-1},
url = {https://hal.science/hal-05774707v1},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Giant tunable topological Hall effect in La0.7Sr0.3MnO3/SrIrO3 bilayers
AU - Andrea Peralta-Somoza
AU - Sandra Lopez
AU - Rafael Fuster
AU - Fernando Gallego
AU - Sergio Valencia
AU - Juan Riquelme
AU - Mariona Cabero
AU - Javier Tornos
AU - Carmen Munuera
AU - Federico Mompeán
AU - Mar García-Hernández
AU - Timothy Charlton
AU - Brian Kirby
AU - Stephan Rosenkranz
AU - Zouhair Sefrioui
AU - Javier Villegas
AU - Suzanne Te Velthuis
AU - Carlos León
AU - Jacobo Santamaría
PY - 2026
DA - 2026/06/27
JO - Communications Materials
DO - 10.1038/s43246-026-01255-1
UR - https://hal.science/hal-05774707v1
AB - The topological Hall effect (THE) arises from a Berry phase imprinted on conduction electron spins as they traverse noncollinear magnetic textures. It constitutes a transport hallmark of chiral magnetism. Very large THE signals are theoretically expected in oxide heterostructures combining 3d or 4d ferromagnets and 5d metals with strong spin–orbit coupling. However, experimental realizations have so far yielded only modest signals whose emergence could not be linked to any chiral magnetic texture. Using ultrathin La₀.₇Sr₀.₃MnO₃/SrIrO₃ bilayers, here we demonstrate a THE that can be switched ON and OFF by the magnetic history, and we establish a direct one-to-one correspondence between the transport anomaly and the emergence—or disappearance—of a chiral magnetic texture at the interface. Further, the associated THE signal is giant, reaching values an order of magnitude larger than observed earlier in analogous systems. Beyond providing a rare, unequivocal evidence for a pure THE, the controllable link between magnetic chirality and the giant Hall signal at oxide interfaces shows a path for engineering reconfigurable conspicuous topological responses, which could impact spintronic sensing and beyond. The topological Hall effect is a key transport signature of chiral magnetism, yet experimental realizations in oxide heterostructures have been limited. Here, the authors use ultrathin La₀.₇Sr₀.₃MnO₃/SrIrO₃ bilayers to demonstrate a switchable, giant topological Hall effect linked to chiral magnetic textures, paving the way for advanced spintronic applications
SN - 2662-4443
ER -