The results of the evaluation of 2019 National Natural Science Foundation projects were announced. The college has received three NSFC youth programs. In recent years, the college has been refining the discipline direction, actively promoting the construction of applied basic research and platform, attaching great importance to the project application of National Natural Science Foundation, and actively mobilizing young talents to carry out project application and preliminary research. With the joint efforts of the university, college and applicants, the number of projects supported by NSFC in recent years ranks in the forefront of the University, which has greatly promoted the development of discipline and specialty construction of the college.
Attachments: introduction of NSFC projects approved in 2019
1. Dr. Li Luo, project name: Research on optical spin Hall effect of magneto-optical waveguide (Project approval No.: 11904038)
Research contents: combined with the novel electromagnetic properties of metamaterials and magneto-optical properties of magneto-optical materials, the unique Magneto-optical Spin Hall Effect of Light (MOSHEL) in magneto-optical metamaterial waveguide is studied. The mechanism of the enhancement and regulation of the self rotating Hall effect by the tunable optical properties and magneto-optical Kerr effect of the metamaterials under different magnetic field modes are revealed. The analytical and numerical algorithms of MOSHEL are improved, and the nonreciprocity and asymmetry of the splitting of circularly polarized light under different magnetic fields are analyzed. The nonreciprocity and asymmetry of MOSHEL are verified by building the MOSHEL quantum weak measurement platform, and the application of MOSHEL in the field of light field regulation is explored.
2. Dr. Yanhong Shen, project name: Research on radiation damage performance of high performance W-Mo nano polycrystals (Project approval No.: 11904037)
Research contents: in fusion reactors, the selection of plasma oriented materials is one of the key issues in the development of fusion energy. High performance W-Mo alloy materials are widely used in national defense, aerospace, high energy physics, electronic information, energy, nuclear industry and other fields due to its advantages of high strength, high density and high melting point. Therefore, W-Mo alloy is also considered as one of the most potential candidate materials for plasma in Tokamak device. Due to the limitation of high temperature radiation and other conditions, it is not easy to study the internal atoms of W-Mo alloy in experiments. It is difficult to get the micro mechanism of internal damage, defect behavior and the evolution process of specific radiation damage such as atom aggregation and migration. In addition, the theoretical simulation research on this aspect is seriously insufficient. In this project, W-Mo nanocomposites are systematically studied based on the first principles and molecular dynamics. The evolution process of radiation damage such as atom aggregation and migration in materials under high temperature irradiation is simulated. The interface structure and properties of W-Mo nano polycrystal model and the influence of grain boundary and average grain size on the life of materials are explored. The micro mechanism of internal damage in materials under high temperature irradiation is described, and a better scheme for improving the properties of materials is proposed, which provide some theoretical reference and guidance for the experimental research and preparation of the materials.
3. Dr. Xiao Liang, project name: Research on tunable high Curie temperature magnetic 2D-TMDs materials based on magnetic proximity effect (Project approval No.: 51902033)
Research contents: the introduction of magnetism into 2D-TMDs is the premise and key issue of the development of new valley electronic devices with lower power consumption and more environmentally protection. It is also one of the research hotspots and cutting-edge fields of materials science in recent years. Using the magnetic proximity effect (MPE) at the van der Waals heterojunction interface of 2D-TMDs / magnetic insulator (MI), not only the magnetic introduction of 2D TMDs can be realized, but also the semiconductor characteristics of the material itself cannot be destroyed. And the equivalent magnetic field caused by MPE at the interface can greatly reduce the external strong magnetic field conditions. However, the same disadvantage as other magnetic introduction methods is that the Curie temperature (TC) of 2D-TMDs based on MPE is low (the highest record is 61k at present), which seriously restricts its application. In view of this, based on the previous research and experimental results, the applicants select the single-layer MoS2 / YIG van der Waals heterojunction as the research object, propose to systematically study the relationship between the interface MPE and YIG surface defects on the basis of clarifying the physical origin of the interface of the van der Waals heterojunction, selectively modify the surface of the lower YIG material, regulate the strength and critical temperature of the MPE, and then improve the magnetization and TC of 2D-TMDs material. The research of this project will open up the research frontier of tunable high TC magnetic 2D-TMDs materials, and provide a broad space for the further development of this kind of two-dimensional semiconductor materials with great application potential in valley electronics.