Science
Researchers observe signs of altermagnetism in strained ultrathin ruthenium dioxide
Scientists detected unconventional magnetic spin textures in atomic-scale films of a material previously considered nonmagnetic in bulk form.
The short version
- Physicists led by teams from Rice University, the University of Minnesota, and the Paul Scherrer Institute observed spin textures consistent with altermagnetism in ultrathin ruthenium dioxide films.
- While bulk ruthenium dioxide does not display magnetism, subjecting atomic-layer-thin films of the material to lattice strain induced electron spin patterns characteristic of the unusual magnetic state.
- Researchers suggest that lattice strain could serve as a mechanism to induce and manipulate magnetic behavior for application in next-generation computer memory and spintronic devices.
Key facts
- Researchers used spin-resolved angle-resolved photoemission spectroscopy combined with theoretical calculations to measure electron spin patterns in ultrathin ruthenium dioxide films.[ScienceDaily]
- Bulk ruthenium dioxide is widely considered nonmagnetic following scientific consensus, but the new study shows its behavior alters when reduced to an ultrathin film under lattice strain.[ScienceDaily]
- The experimental findings were published in the journal Science Advances by primary author Yichen Zhang and senior collaborators Ming Yi, Bharat Jalan, and Milan Radovic.[ScienceDaily]
- The research received financial support from the U.S. Department of Energy, the Gordon and Betty Moore Foundation, and the Robert A. Welch Foundation.[ScienceDaily]
What remains uncertain
- Whether lattice strain can be reliably harnessed as a control mechanism in practical electronics or computer memory architectures remains unproven outside laboratory conditions.[ScienceDaily]
Sources
- Scientists switch on a strange new form of magnetism in an ultrathin materialScienceDaily - Science