|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
|공지||2019/09/18 - 12/5||Seminar Room #1323||Prof. David Schuster and etc.||Fall 2019: Physics Seminar Serises|
|공지||2019/09/02 - 12/09||Seminar Room 1501||이호성 박사 (한국표준과학연구원) and etc.||Fall 2019: Physics Colloquium|
|53||Oct. 16 (Fri.), 04:00 PM||https://kaist.zoom.us/j/89198078609||Dr. Daesu Lee||Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern|
|52||Oct. 17th (Mon) 11:00 AM||#1323,(E6-2, 1st fl.)||Nguyen Quang Liem, Institute of Materials Science, VAST, Viettnam||IMS and examples of the studies on optoelectronic materials|
|51||Oct. 18 (Tue.), 1:30 PM||1st fl. #1323(E6-2)||Dr. Chan-Ho Yang, Department of Physics, KAIST||"Visualization of oxygen vacancy in motion and the interplay with electronic conduction"|
|50||Oct. 18 (Tue.), 3PM||E6-2. 1st fl. #1323||Dr. JunHo Suh, Korea Research Institute of Standards and Science||“Hybrid quantum systems with mechanical oscillators”|
|49||Oct. 25 (Fri), 15:00 ~||#1323, E6-2||Daesu Lee,Junwoo Son,MyungJoon Han ,Siheon Ryee,Eun-Gook Moon||Physics Seminar|
|48||Oct. 27th(Thu) 4PM||#1323(E6-2)||Dr. 이 강 희, KAIST, Mechnical Engineering||Terahertz Metal Optics|
|47||October 11 (Thu.), 16:00 PM||#1323, E6-2||Prof. Joung-Real Ahn||Dirac electrons in a graphene quasicrystal|
|46||October 15 (Mon.), 16:00 PM||#1323, E6-2||Dr. Yongjoo Baek||Universal properties of macroscopic current-carrying systems|
|45||October 15 (Tue.), 16:00 PM||#1323, E6-2||Prof. Pilkyung Moon||Moiré superlattices and graphene quasicrystal|
|44||October 15, 2020 (Thursday||CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus||Prof. Gil-Ho Lee (POSTECH)||Graphene-based Josephson junction microwave bolometer|
|43||October 15, 5:00pm||https://bit.ly/3ndIiJn||Dr. Samuli Autti||Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe|
|42||October 16 (Tue.), 10:00 AM||#1323, E6-2||Dr. Won-Ki Cho||Capturing protein cluster dynamics and gene expression output in live cells|
|41||October 16 (Wed), 4:00pm||#1323 (E6-2, 1st fl.)||Dr. Jaewon Song||Emergent black holes and monopoles from quantum fields|
|40||October 17 (Thu.), 16:00 PM||#1323, E6-2||Prof. Namkyoo Park||Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing|
|39||October 18 (Thu.), 10:00 AM||#1323, E6-2||Dr. Duyoung Min||Understanding membrane protein folding using single-molecule force techniques|
|38||October 18 (Thu.), 16:00 PM||#1323, E6-2||Prof. Jongseok Lee||Applications of nonlinear optics for condensed matter researches|
|37||October 19 (Fri.), 10:00 AM||#1323, E6-2||Dr. Jongsoo Yoo||Energy conversion processes during magnetic reconnection in a laboratory plasma|
|36||October 24 (Wed.), 10:30 AM||E6-1, Lecture Room 1501(1F)||Prof. Kerry J. Vahala||Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers|
|35||October 25 (Thu.), 4:00 PM||#1323, E6-2||Dr. Gang Li||Abelian and non-Abelian dark photons|
|34||October 26 (Fri.), 4:00 PM||#1323, E6-2||Dr. Kyusung Hwang||Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates|