2021/01/07(Thu) 11:00 -12:00 五樓第一會議室 5F, 1st Meeting Room
Title
From emergent material to emergent phenomena for spin current exploration
Speaker
曲丹茹博士 (中央研究院物理研究所) Dr. Danru Qu (Institute of Physics, Academia Sinica)Abstract
The topological quantum matters with exciting physical phenomenon protected by the topology in their band or spin structures have taken center stage in the field of condensed matter physics. In the first part of my talk, I will discuss the synthesis and spin current exploration in one of the gapless topological semimetals, the magnetic Weyl semimetal Mn3Sn thin films, where we observed large anomalous Hall and spin Hall effects, which may originate from the large berry curvature caused by the Weyl nodes [1-5]. In the second part of my talk, I will discuss a novel type of spin Hall effect (SHE), the magnetization dependent spin Hall effect (MDSHE), which breaks the orthogonal relation among the direction of the charge current, spin current, and spin orientation beyond the conventional SHE [6]. The MDSHE allows arbitrary spin accumulation at the film surface controlled by magnetization. These relativistic transport properties have great potential for future electronic, quantum devices, and spintronic applications.
[1] D. Qu et al, Phys. Rev. Lett. 110, 067206 (2013)
[2] D. Qu et al. Phys. Rev. B 89 140407 (R) (2014)
[3] D. Qu et al., Phys. Rev. Mater. 2, 102001(R) (2018)
[4] T. Higo et. al, Appl. Phys. Lett. 113, 202402 (2018)
[5] P. K. Muduli et al., Phys. Rev. B 99, 184425 (2019)
[6] T. C. Chuang, D. Qu* et. al, Phys. Rev. Research 2, 032053(R) (2020)
Abstract
Language
演講語言 (Language): in English
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