|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
|232||June 14 (THU), 10:00 AM||E6-2, 2nd fl. #2502||Prof. Kenji Toyoda||Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation|
|231||Jun. 2 (Fri.), 4:00 PM||#1323 (E6-2. 1st fl.)||Dr. Sang Wook Kim||Maxwell's demon in quantum wonderland|
|230||Jun. 2 (Fri.), 02:30 PM||E6-2. 1st fl. #1323||Dr. Euyheon Hwang(황의헌)||Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal)|
|229||Jun. 18 (MON), 10:00 AM||E6-2. 2nd fl. #2502||Dr. Thibault VOGT||Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms|
|228||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|
|227||Jun. 14 (Tue) 4PM||Seminar Room (#2502, 2nd fl.)||Young-Sik Ra, Université Pierre et Marie Curie||Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction|
|226||Jun. 11 (Fri.), 04:00 PM||Online seminar||Dr. Keun Su Kim(Yonsei University)||Pseudogap in surface-doped black phosphorus|
|225||Jun. 11 (Fri.), 02:30 PM||Online seminar||Dr. Jin Woong Cha(KRISS)||Engineering sound waves and vibrations in multi-mode nanomechanical systems|
|224||Jun. 10 (Fri.), 11:00 AM||Online seminar||Dr. Yoon Jang Chung(Laboratory for Physical Sciences, University of Maryland)||Record-quality two-dimensional electron systems|
|223||Jun. 10 (Fri.), 04:00 PM||E6-2. 1st fl. #1323||Dr. Sanghoon Kim(Department of Physics, University of Ulsan)||Fe5GeTe2의 나선형 자성특성과 자기저항의 전류밀도 의존성 연구|
|222||Jun. 10 (Fri.), 02:30 PM||E6-2. 1st fl. #1323||Dr. Seunghun Lee(Department of Physics, Pukyong National University)||Combinatorial strategy for condensed matter physics: study on rare earth hexaborides thin films|
|221||Jun. 1(Wed) 10:30 AM||BK21 Conference Room (#1318, E6-2)||Dr. Noriaki Horiuchi, Editor, Nature Photonics||Welcome to Nature Photonics|
|220||Jun. 01 (Fri.), 11:00 AM||E6-2. 1st fl. #1323||Dr. Seung Sae Hong||Topological phases in low-dimensional quantum materials|
|219||Jun 8 (Tue), 10:00 AM||Zoom webinar||Toshihiko Baba (Yokohama National University, Japan)||Photonic crystal devices for sensing|
|218||Jun 28, 14:00||E6-2, #1322||Dr. Bongjae Kim, Dr. Sooran Kim, Dr. Jeongwoon Hwang||1st Research-exchange meeting of computational material physics|
|217||Jun 24 (Mon) 11:00||E6-2, #1323||Dr. Henning Schomerus||Topological photonic anomalies|
|216||Jun 22(Tue) 17:00||Zoom webinar||Wei Han (Peking University, China)||Spintronics meets Quantum Materials|
|215||Jun 1 (Wed) 4 PM||#1323(E6-2 1st fl.)||Kil-Byoung Chai, Caltech||Laboratory experiments relevant to mesospheric clouds, Saturn’s rings & astrophysical jets|
|214||July. 14 (Fri.), 3:00 PM||#1323 (E6-2. 1st fl.)||Dr. Jun Hyun Lee / University of Maryland||Chiral anomaly in disordered Weyl semimetals|
|213||July 9 (Mon.), 14:00 PM||#1323, E6-2||Prof. Cesar A. Hidalgo, MediaLab, MIT||The principles of collective learning|