Formulation of bulk-edge correspondence in magnonic systems

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13531
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: Tohoku University
• Principal Investigator: Sato Koji 東北大学, 金属材料研究所, 助教 (70708114)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: マグノン / トポロジカル絶縁体 / スピン波 / ワイル半金属

Outline of Final Research Achievements

We theoretically investigated magnons for the purpose of understanding topological phenomena in bosonic systems. We found that conduction electrons coupled with magnons under dipolar interactions can exhibit anomalous Hall effect even in the absence of spin-orbit interactions. Moreover, we investigated Weyl semimetals motivated by a resemblance in a certain type of magnonic systems, and we clarified the structure of topological invariants in time-reversal symmetric Weyl semimetals.

Free Research Field

スピントロニクス