Unidirectional spin-wave edge modes in magnonic crystal
Source abstract
Abstract
We present a numerical demonstration of magnonic crystals hosting unidirectional, topologically protected edge states. The magnonic crystal is formed of dipolarly coupled Permalloy triangles. We show that due to the geometry of the block, the size of the structure can be scaled up. In addition, edge states can be found over a wide frequency range. Experimental detection of edge excitations in the considered system can be done with state-of-the-art techniques. Thus, we demonstrate a proof-of-concept magnonic Chern topological insulator nanostructure with simple geometry feasible for experimental realization. Furthermore, by tuning the strength of the perpendicular magnetic field, we induce a topological phase transition, which results in the change of direction of the topological edge state. Then, we demonstrate the magnonic switch based on this effect.
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Research context
OpenAlex topics: Topological Materials and Phenomena · Magnetic properties of thin films · Quantum many-body systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Electrical Engineering, Slovak Academy of Sciences 1 , Dubravska Cesta 9, SK-841-04 Bratislava, Slovakia
Centre for Advanced Materials Application CEMEA, Slovak Academy of Sciences 2 , Dubravska Cesta 9, 845 11 Bratislava, Slovakia
Faculty of Physics, Adam Mickiewicz University in Poznan 3 , Umultowska 85, Poznan PL-61-614, Poland
Department of Physics, MOE Key Laboratory of Modern Acoustics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University 4 , Nanjing 210093, China
IMDEA Materials Institute 5 , Calle Eric Kandel, 2, 28906 Getafe, Madrid, Spain
Funding
European Regional Development Fund · Agentúra na Podporu Výskumu a Vývoja · Vedecká Grantová Agentúra MŠVVaŠ SR a SAV · Narodowe Centrum Nauki · Poznan Supercomputing and Networking Center
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