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[納米物理與器件重點實驗室系列學術報告(127)] Recent advances on first-principles study of Dzyaloshinskii-Moriya interaction at interfaces
時間: 2019年06月10日 10:00
地點: 中科院物理所M樓249會議室
報告人: 楊洪新

中科院寧波材料技術與工程研究所

Abstract:

The antisymmetric exchange interaction, Dzyaloshnskii-Moriya Interaction (DMI), has become recently a subject of tremendous interest for both fundamental research and applications due to its crucial role in the creation, annihilation and the influence on the dynamics of magnetic Skyrmions and chiral domain walls. Here, I will present a general DMI calculation approach based on DFT total energy calculations. I will address the main features and microscopic mechanism of typical Fert-Levy type DMI at interfaces between ferromagnetic and heavy metals by clearing up several fundamental questions: how does the DMI extend away from the interface? Where is the corresponding electronic energy source located? [1] How to design structures with enhanced DMI? [2,3] Moreover, I will show results at ferromagnet/graphene interfaces beyond Fert-Levy type DMI [4]. At the end, I will present some new results of DMI and Skyrmion study based on 2D ferromagnets. [5]

[1] HY, A. Thiaville, S. Rohart, A. Fert, M. Chshiev, Phys. Rev. Lett. 115, 267210 (2015)
[2] HY, O. Boulle, V. Cros, A. Fert, M. Chshiev, Scientific Reports 8, 12356(2018).
[3] O. Boulle, J. Vogel, HY, et al., Nature Nanotech. 11, 449 (2016).
[4] HY, G. Chen, et al., Nature Materials 17, 605(2018)
[5] J. Liang, M. Chshiev, A. Fert, HY, submitted (2019).

Brief bio:

楊洪新本科畢業于吉林大學,碩士在吉林大學和中科院物理所聯合培養,2012年于法國格勒諾布爾大學獲得博士學位,后陸續在巴黎十一大,澳大利亞聯邦科學與工業研究中心(CSIRO),法國SPINTEC,法國國家科學中心和泰雷茲聯合物理實驗室,以及日本國立材料研究所(NIMS)從事科學研究工作,2016年獲中組部青年千人計劃支持,17年加入寧波材料所,創建量子功能材料團隊,團隊現有3名研究員、8名博后等共30余人。

  研究興趣主要集中在表面界面自旋電子學的理論計算研究,已在Nature Materials,Nature Nanotech.,PRL,Nano Lett.,Advanced Materials等雜志上發表論文50余篇,在垂直磁各向異性、拓撲磁結構機理研究、自旋霍爾效應以及石墨烯自旋電子學等領域都有文章入選ESI高引論文。Nature等雜志審稿人。

Email: [email protected]

報告邀請人:顧長志(82648197)


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