|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
|201||May. 17(Mon) 17:00||Zoom webinar||Jing Shi (UC Riverside, USA)||Spin current generation and detection in uniaxial antiferromagnets|
|200||May. 8th (Wed), 16:00||E6 Room(#1323)||Jieun Lee||Imaging valley dependent electron transport in 2D semiconductors|
|199||May. 8th (Wed), 16:00||E6 Room(#1323)||Jieun Lee||Imaging valley dependent electron transport in 2D semiconductors|
|198||June 27 (Thu), 2:00 PM||#2502, E6-2||Hyun-Yong Lee||Gapless Kitaev Spin Liquid to Loop and String Gases|
|197||Jun. 16 (Thu) 4PM||#1323(E6-2, 1st fl.)||Hyochul Kim, Samsung Advanced Institute of Technology||Quantum information processing using quantum dots and photonic crystal cavities|
|196||Dec. 11 (Fri.), 04:00 PM||online||Hyobin Yoo(Sogang Univ.)||Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials|
|195||August. 1st (Thu), 14:00||E6 Room(#1323)||Hyeok Yoon||Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy|
|194||August 27 (Tue.), 4:00PM||Rm. 1323, E6||Hiroshi Eisaki||Critical current properties of Fe-based superconductors|
|193||January 17 (Fri), 4:00 PM||#1323, E6-2||Hiroki Ikegami||Symmetry Breaking and Topology in Superfluid 3He|
|192||September 26 (Thu.), 16:00 PM||#1323, E6-2||Han Seb Moon||Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble|
|191||December 27(Fri.), 15:00||E6-2,#5318||Han Gyeol Suh||The superconducting order parameter puzzle of Sr2RuO4|
|190||Dec 27 (Fri), 3:00 PM||#5318, E6-2||Han Gyeol Suh||The superconducting order parameter puzzle of Sr2RuO4|
|189||May. 12(Thu), 4pm||E6-2. #1323 & Zoom||Dr.Philip Chang (University of California San Diego, Department of Physics)||New frontiers of electroweak physics at the LHC|
|188||May. 19(Thu), 4pm||E6-2. #1323 & Zoom||Dr.Jay Hyun Jo (Yale University, Department of Physics)||Chasing Long Standing Neutrino Anomalies with MicroBooNE|
|187||May. 18(Wed), 4pm||E6-2. #1323 & Zoom||Dr.Heeyeon Kim (Rutgers University, Department of Physics and Astronomy)||Geometry, Algebra, and Quantum Field Theory|
|186||Nov. 18th (Fri) 10:30 a.m.||#5318(5th fl.)||Dr. 최 순 원, Havard University||Non-equilibrium many-body spin dynamics in diamond|
|185||Oct. 27th(Thu) 4PM||#1323(E6-2)||Dr. 이 강 희, KAIST, Mechnical Engineering||Terahertz Metal Optics|
|184||June 28 (Fri.), 13:30 PM||#1323, E6-2||Dr. Yusuke Kozuka||Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures|
|183||Apr. 08 (Fri.), 13:30 PM||E6-2. 1st fl. #1501||Dr. Yunkyu Bang, Chonnam National Univ.||Theoretical Overview of Iron-based superconductors and its future|
|182||Sep. 26 (Tue.), 11AM||#1323 (E6-2. 1st fl.)||Dr. Yukiaki Ishida / ISSP, University of Tokyo||Time-resolved ARPES study of Dirac and topological materials|