16:45 〜 17:00
▲ [11p-M101-14] Theoretical study of spin accumulation and domain wall motion in two-dimensional magnetic kagome lattice
キーワード：spintronics, topological materials, spin torque
We focus on the electrically induced spin accumulation and the domain wall motion in a two-dimensional quantum anomalous Hall (QAH) ferromagnet. For the calculation, we use the kagome lattice with the Kane-Mele type spin-orbit coupling and exchange coupling to local magnetic moments. Each magnetic domain becomes the QAH state, generating the chiral edge conduction.
We calculate the electrically induced spin density on each unit cell by using the Kubo formula. Consequently, we observe the spin density localized at the domain wall. Furthermore, these results are expected to influence the domain wall motion in the QAH state. Contrary to the conventional current-induced magnetization manipulation such as the spin-transfer torque, this phenomenon can be induced without electric currents. Therefore, the QAH ferromagnets can be new candidates for the low-energy consumption spintronics devices.
We calculate the electrically induced spin density on each unit cell by using the Kubo formula. Consequently, we observe the spin density localized at the domain wall. Furthermore, these results are expected to influence the domain wall motion in the QAH state. Contrary to the conventional current-induced magnetization manipulation such as the spin-transfer torque, this phenomenon can be induced without electric currents. Therefore, the QAH ferromagnets can be new candidates for the low-energy consumption spintronics devices.