博士后project介绍： 职位1：In situ transmission electron microscopy of two-dimensional ferromagnetic crystals Ferromagnetic van der Waals (vdW) crystals are considered to be ideal materials for two-dimensional spintronic applications, such as atomically-thin and flexible magneto-optic and magnetoelectric devices. These prospects motivate research on vdW materials that possess long-range ferromagnetic order close to room temperature. For example, Fe3GeTe2 and Fe5GeTe2 are vdW materials that exhibit perpendicular magneto- crystalline anisotropy and have relatively high Curie temperatures of ~200 and ~300 K, respectively. These materials can also host skyrmionic spin textures. Information about both the magnetic spin textures and the crystal structures of atomically-thin (~several layer) vdW crystals on different length scales is essential to understand their correlation and to improve the design and growth of the crystals for further spintronic applications. This project will involve a systematic study of atomically-thin vdW crystals using state-of-the-art transmission electron microscopy techniques. Aberration-corrected (scanning) transmission electron microscopy and spectroscopy will be used to image atomic scale crystal structures (defects and/or stacking faults). Lorentz microscopy and off-axis electron holography, in combination with in situ electrical contacting and the application of magnetic fields and laser illumination, will then be used to visualize and manipulate magnetic spin textures with feature sizes on the sub-micron to atomic scale. Experimental measurements of crystal structures and magnetic spin textures will be combined with simulations and theoretical calculations to provide guidance for the design of novel vdW materials with improved magnetic properties. 职位2：Static and dynamic properties of magnetic topological solitons at room temperature Topological magnetic solitons have attracted attention in recent years, both for fundamental reasons and for their potential applications in spintronic and neuromorphic devices. Magnetic solitons in solids include skyrmions, antiskyrmions and bobbers, as well as merons and antimerons in chiral magnets, antiskyrmions in tetragonal magnets and skyrmions in multilayers of ferromagnetic materials and heavy metals. Co-Zn-Mn alloys are able to host skyrmions and merons even at room temperature. However, the relationship between magnetocrystalline anisotropy and the soliton stability is not yet understood. In this project, the static and dynamic properties of magnetic topological solitons in Co-Zn-Mn will be studied using Lorentz microscopy and off-axis electron holography in the transmission electron microscope, in combination with the application of magnetic fields and electric currents, for samples of different crystallographic orientation and geometry. The experimental measurements will be combined with simulations and theoretical calculations to provide a deep understanding of fundamental soliton physics and to provide guidelines for the design of room temperature soliton-based devices. 职位3: Bridging the gap between micromagnetic simulations and magnetic imaging in transmission electron microscopy One of the most rapidly developing fields in modern nanomagnetism is the real-space imaging of three-dimensional topological magnetic solitons in materials. Although it is possible to record projections of such three-dimensional magnetic textures using techniques such as Lorentz imaging or off-axis electron holography in the transmission electron microscope, the reliable reconstruction of three-dimensional magnetic information from such datasets is challenging. Until now, the comparison of experimental datasets with theoretical images obtained using micromagnetic simulations has been the most reliable approach. However, it requires the use of realistic micromagnetic models in combination with high performance computational methods to generate predictions of magnetic contrast as a function of specimen tilt angle and other experimental parameters. In this project, the joint efforts of experts from the Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and the Institute for Advanced Simulation will be directed towards the development of publicly-available cross-platform high performance software for the theoretical calculation of Lorentz images and electron holographic phase images of magnetic contrast in real time. The project also aims to optimise the use of these calculated images to provide solutions to the inverse problem-tomographic reconstruction of magnetic textures from series of experimental images recorded at different sample tilt angles. 职位4: Transmission electron microscopy of iron-based magnetic nanoparticles for cancer therapy Chemodynamic therapy (CDT), an emerging therapeutic strategy, has recently been proposed as an in situ treatment using the Fenton reaction or Fenton-like reaction to generate hydroxyl (OH) radicals in tumour sites. It is a new tumor treatment strategy that is believed to have scientific research value and clinical application potential. Iron-based magnetic nanomaterials are believed to be ideal biomaterials for tumor CDT. This project will involve a study of the kinetic optimization plan for CDT from the electronic state level of reaction center atoms (transition metals), in order to provide guidance for improving the yield of hydroxyl radicals at tumor sites. In situ high-resolution transmission electron microscopy and spectroscopy will be used to characterize the crystalline, chemical and electronic structures of the iron-based magnetic nanoparticles. In combination with the Fenton reaction process in a tumor micro-environment, the core reaction kinetics and research methods of CDT will be investigated, with the aim of improving tumor CDT. 申请材料： 1.个人简历 2. 学位证书复印件 3. 代表性论文。 应聘方式： 请有意者将申请材料设置为“应聘岗位+姓名”投递到系统，对符合要求的申请人将尽快回复。
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