|장소||#1323 (E6-2, 1st fl.)|
|일시||April 11 (Wed), 1:30pm|
|연사||Dr. Yongsoo Yang|
Dept. of Physics and Astronomy, UCLA
Modern science and technology rely on functional materials, and the physical properties of these materials often strongly depend on defects, local disorder, nanoscale heterogeneities, and grain structures at the atomic scale. Traditional crystallography, which is reliant on periodicity, has been the main method for determining crystal structures, but cannot determine defects or other non-crystalline features. My work goes beyond crystallography. Without any prior assumption of underlying structure, atomic electron tomography (AET) is now able to locate the 3D coordinates of individual atoms with picometer precision and with elemental specificity [1-3]. I will show a variety of complex atomic structures with 3D atomic-level details; including grain boundaries, chemical order/disorder, phase boundaries, and anti-site point defects. I will further demonstrate that these experimentally determined atomic structures can be combined with quantum mechanical calculations to provide an atomic-level understanding of physical properties such as 3D strain tensors, magnetic moments and local magnetocrystalline anisotropy. Understanding the relationship between atomic structure and physical properties will open up new avenues in condensed matter physics and allow the rational design of novel materials at the atomic scale [1-2].
 Yang et al., Nature 542, 75-79 (2017).
 Xu et al., Nature Mater. 14, 1099-1103 (2015).
 Pryor*, Yang* et al., Sci. Rep. 7:10409 (2017).
Contact: Yongseop Kang, Administration Team (T.2599)
Department of Physics
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|219||Dec. 9(Fri), 4p.m.||#1323(E6-2. 1st fl.||Dr. Kun Woo Kim, KIAS||Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator|
|218||Dec.10(Thu), 01:55 PM||Zoom||Yin Wen (University of Tokyo)||Consistency of Boltzmann equation and light dark matter from inflaton decay|
|217||Dec.23(Wed), 10:00~16:00||Online||Prof. YongKeun Park (KAIST) and etc.||Online workshop for Quantitative Phase Imaging|
|216||Dec.9(Wed), 10:00AM||Zoom||Prof. Andrew Geraci (Northwestern University)||Searching for the QCD axion with the ARIADNE experiment|
|215||December 13 (Fri.), 1:00 PM||#2501, E6-2||Dr. Chang-Jong Kang||Computational Material Designs: Current Status and Future Directions|
|214||December 13 (Fri.), 1:30-4:30 PM||#1323, E6-2||Biophysics Mini-symposium at KAIST|
|213||December 18 (Tue.), 4:00 PM||#1323, E6-2||Prof. Shin-ichi Uchida||Road to Higher Tc Superconductivity|
|212||December 2(Wed), 10:00AM||Zoom||Prof. Rakshya Katiwada (Illinois Institute of Technology)||Recent progress in Axion Dark Matter eXperiment (ADMX) technology|
|211||December 27(Fri.), 15:00||E6-2,#5318||Han Gyeol Suh||The superconducting order parameter puzzle of Sr2RuO4|
|210||December 3 (Tue.), 4:00 PM||#1323, E6-2||Dr. Jong Mok Ok||Toward Quantum Materials with Correlated Oxides|
|209||December 5 (Thu.), 16:00 PM||#1323, E6-2||Prof. Soon-Hong Kwon||Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell|
|208||Feb. 1 (Wed.), 2p.m.||#1323(E6-2. 1st fl.)||Dr. Michihisa Yamamoto, Department of Applied Physics, The University of Tokyo||Quantum electron optics using flying electrons|
|207||Feb. 12 (Mon), 3:00pm||#C303, (Creation Hall 3F, KAIST Munji Campus)||Dr. Byeongsu Yang, Kamioka Observatory, Univ. of Tokyo||The recent result of XMASS Experiment|
|206||Feb. 2(Tue) 2:30 PM||Zoom||Prof. Sangsik Kim (Texas Tech University, USA)||Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems)|
|205||Feb. 25 - Jun 3||Rm. 1501 (E6)||Spring 2019: Physics Colloquium|
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