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Spin-electricity conversion induced by spin injection into topological insulators

トポロジカル絶縁体へのスピン注入で誘起されるスピン-電気変換

塩見 雄毅*; 野村 健太郎*; 梶原 瑛祐*; 江藤 数馬*; Novak, M.*; 瀬川 耕司*; 安藤 陽一*; 齊藤 英治

Shiomi, Yuki*; Nomura, Kentaro*; Kajiwara, Yosuke*; Eto, Kazuma*; Novak, M.*; Segawa, Koji*; Ando, Yoichi*; Saito, Eiji

We report successful spin injection into the surface states of topological insulators by using a spin pumping technique. By measuring the voltage that shows up across the samples as a result of spin pumping, we demonstrate that a spin-electricity conversion effect takes place in the surface states of bulk-insulating topological insulators Bi$$_{1.5}$$Sb$$_{0.5}$$Te$$_{1.7}$$Se$$_{1.3}$$ and Sn-doped Bi$$_{2}$$Te$$_{2}$$Se. In this process, the injected spins are converted into a charge current along the Hall direction due to the spin-momentum locking on the surface state.

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パーセンタイル:0.89

分野:Physics, Multidisciplinary

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