Chiral logic computing with twisted antiferromagnetic magnon modes  

作　　者：Chenglong Jia Min Chen Alexander F.Schäffer Jamal Berakdar 

机构地区：[1]Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education&Lanzhou Center for Theoretical Physics,Lanzhou University,Lanzhou,China [2]Institut für Physik,Martin-Luther-Universität Halle-Wittenberg,Halle(Saale),Germany

出　　处：《npj Computational Materials》2021年第1期917-924,共8页计算材料学（英文）

基　　金：This work is supported by the National Natural Science Foundation of China(No.91963201,and 11834005);the German Research Foundation(SFB TRR 227);the 111 Project under Grant No.B2006。

摘　　要：Antiferromagnetic(AFM)materials offer an exciting platform for ultrafast information handling with low cross-talks and compatibility with existing technology.Particularly interesting for low-energy cost computing is the spin wave-based realization of logic gates,which has been demonstrated experimentally for ferromagnetic waveguides.Here,we predict chiral magnonic eigenmodes with a finite intrinsic,magnonic orbital angular momentumℓin AFM waveguides.ℓis an unbounded integer determined by the spatial topology of the mode.We show how these chiral modes can serve for multiplex AFM magnonic computing by demonstrating the operation of several symmetry-and topology-protected logic gates.A Dzyaloshinskii–Moriya interaction may arise at the waveguide boundaries,allowing coupling to external electric fields and resulting in a Faraday effect.The uncovered aspects highlight the potential of AFM spintronics for swift data communication and handling with high fidelity and at a low-energy cost.

关 键 词：FERROMAGNETIC topology CHIRAL 

分 类 号：O62[理学—有机化学]