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Updated: Jan 24, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.3K
Interface-to-Surface Transition Induced Topological Hall Effect in 2-Dimensional SrRuO3 Integrated on Silicon.
Qinglong Wang1, Bin He1, Jinrui Guo1
1Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan 250022, China.
Research (Washington, D.C.)
|January 23, 2026
Summary
Researchers induced the topological Hall effect (THE) in strontium ruthenate (SrRuO3) membranes by breaking structural symmetry. This breakthrough enables robust chiral spin textures for advanced spintronic devices.
Area of Science:
- Condensed matter physics
- Materials science
- Spintronics
Background:
- Topological Hall effect (THE) arises from chiral spin textures.
- These textures are driven by structural symmetry breaking and Dzyaloshinskii-Moriya interaction (DMI).
- SrRuO3 (SRO) is a material with potential for spintronic applications.
Purpose of the Study:
- To enhance DMI and induce THE in SRO.
- To explore structural-symmetry-breaking strategies for SRO films.
- To investigate the properties of freestanding SRO membranes.
Main Methods:
- Fabrication of freestanding SRO membranes by disrupting the rigid substrate interface.
- Asymmetric surface termination engineering (Sr-O top, Ru-O bottom).
- Characterization of THE signal and material properties (crystallinity, coherence).
Main Results:
- Freestanding SRO membranes exhibit a pronounced THE signal.
- The THE signal persists up to 100 K.
- High crystallinity and electronic coherence are maintained in the freestanding membranes.
- Rigid epitaxial SRO counterparts showed no detectable THE.
Conclusions:
- Structural-symmetry-breaking strategy successfully induces robust THE in SRO.
- Transferable oxide membranes offer a platform for generating chiral spin textures.
- This work has direct implications for developing low-power spintronic devices.
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