Scientific Achievement
For the first time, high-frequency topological kink modes — kink magnetoplasmons (KMPs) — have been demonstrated in a unique device featuring biased magnetic domains.
Significance and Impact
The demonstrated KMP architecture could be generalized to more complex magnetic patterns useful for novel integrated topological circuits.
Research Details
- KMPs localized at the magnetic domain boundaries in a homogeneous two-dimensional electron gas were experimentally demonstrated.
- Sample processing used a scanning electron-beam and focused ion beam system, and low-temperature sample characterization used a dilution refrigerator system; both systems are at the Center for Nanoscale Materials (CNM).
Work was performed in part at CNM.
About Argonne’s Center for Nanoscale Materials
The Center for Nanoscale Materials is one of the five DOE Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the DOE Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE’s Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. For more information about the DOE NSRCs, please visit https://science.osti.gov/User-Facilities/User-Facilities-at-a-Glance.
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The U.S. Department of Energy’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, visit https://energy.gov/science.