:::

106-2專題演講-1070509

演講活動
張貼人:李明芳公告日期:2018-02-12
 
Time2018/5/9 (Wed.) 14:20~16:20
SpeakerProf.徐斌睿(Pin-Jui Hsu)
國立清華大學物理學系/Department of Physics, National Tsing Hua University
Title利用自旋極化掃描穿隧電子顯微鏡解析和操控磁性斯格明粒子
     
Imaging and Manipulating Individual Magnetic Skyrmions by Spin-Polarized Scanning Tunneling Microscopy
Abstract
Magnetic skyrmions are topologically protected quasiparticles with whirling spin textures [1-4]. They offer promising perspectives, e.g., robustness against local perturbations [5], motion driven by low current densities [6], and skyrmion Hall effect [7] etc., which are envisioned to be used as magnetic bits in next-generation information technology and skyrmion-based devices. Recently, magnetic ultrathin films [8] and multilayers [9] grown on heavy metal substrates support the formation of individual magnetic skyrmions due to the breaking of inversion symmetry and sizable interfacial Dzyaloshinskii-Moriya (DM) interaction. In this talk, I will report on the studies of magnetic skyrmions in Fe triple-layer (TL) on Ir(111) [10], they show an anisotropic shape due to inherited structural reconstructions followed by Fe double-layer (DL) underneath [11] as resolved by using spin-polarized scanning tunneling microscopy [12-14]. By exploiting the electric fields between the tip and sample, single skyrmions on Fe-TL can be created and annihilated in a controllable fashion. In addition, I will also talk about the isotropic magnetic skyrmions stabilized on Fe-DL by loading the sample with hydrogen atoms. To understand the underlying mechanism, ab initio calculations have been performed and attribute to an increased interlayer distance and consequently modified magnetic interactions, which suggests that hydrogenation provides an unique pathway to engineer crucial magnetic parameters and enables a drastic change of tuning noncollinear magnetism in low-dimensional magnetic materials [15].
PlaceRoom S101, Gongquan Campuses, NTNU
 
最後修改時間:2018-02-23 PM 4:07

1234

單位簡介

本系的重點研究領域包括:凝態物理、光電與奈米科學、高能與粒子物理、軟凝態物理與生物物理、原分子光學物理、及物理科學教育等。本系前身為臺灣省立師範學院理化系物理組,成立於民國三十五年(1946年)本校創校之始。民國五十一年(1962年)本系獨立成系,民國六十三年(1974年)成立物理研究所碩士班,民國八十年(1991年)成立研究所博士班。長久以來,本系肩負著培育臺灣中等學校物理科師資的重任,但也不忘在物理學術研究上求新求進步。至今本系培育出的學術人才已有一位中研院院士及近百位中研院研究員及大學教授,各行各業的高科技人材更是不勝枚舉。民國八十三年師資培育法改制後,本系已升級為尖端學術研究、科技應用研發、及中學師資培育三者齊備的系所。

  • 國立臺灣師範大學物理系系友會
  • 系友會線上小額捐款
  • 徐有庠盃-臺灣青年學生物理辯論競賽
  • 國際物理奧林匹亞競賽
  • BOSON CLUB
cron web_use_log