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    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/111658


    Title: Spin chemical potential bias induced surface current evidenced by spin pumping into the topological insulator B i2 T e3
    Authors: Abdulahad, Faris Basheer;Lin, Jin-Han;Liou, Yung;Chiu, Wen-Kai;Chang, Liang-Juan;Kao, Ming-Yi;Liang, Jun-Zhi;Hung, Dung-Shing;Lee, and Shang-Fan
    Contributors: 應物所
    Date: 2015-12
    Issue Date: 2017-08-07 17:45:36 (UTC+8)
    Abstract: A spin chemical potential bias can induce a spin-polarized current by the exchange interaction of a ferromagnet with the spin-momentum locking surface states of the topological insulators. We carried out our ferromagnetic resonance experiment in a NiFe/Bi2Te3 heterostructure. Apart from the enhanced Gilbert damping constant, we observed strong enhancement of the effective magnetic field at low temperatures. The enhanced field decreased exponentially with increasing temperature at an energy scale of 2.5 meV, representing the strength of the exchange coupling. We attribute the enhanced field to the induced spin-polarized current in the surface states of Bi2Te3. ©2015 American Physical Society.
    Relation: Physical Review B - Condensed Matter and Materials Physics, 92(24), 241304(R)
    Data Type: article
    DOI 連結: http://dx.doi.org/10.1103/PhysRevB.92.241304
    DOI: 10.1103/PhysRevB.92.241304
    Appears in Collections:[應用物理研究所 ] 期刊論文

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