visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-04-11 13:30 
연사  
장소 #1323 (E6-2, 1st fl.) 

Physics Seminar

 

Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level

 

Dr. Yongsoo Yang

Dept. of Physics and Astronomy, UCLA

 

April 11 (Wed), 1:30pm

#1323 (E6-2, 1st fl.)

 

 

Abstract:

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].

[1] Yang et al., Nature 542, 75-79 (2017).

[2] Xu et al., Nature Mater. 14, 1099-1103 (2015).

[3] Pryor*, Yang* et al., Sci. Rep. 7:10409 (2017).

 

Contact: Yongseop Kang, Administration Team (T.2599)

 

Department of Physics

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
394 2019-04-19 16:00    Graphene and hBN heterostructures file
393 2019-04-23 16:00    From Mott physics to high-temperature superconductivity file
392 2019-04-26 16:00    Robust Quantum Metrology using Strongly Interacting Spin Ensembles and Quantum Convolutional Neural Network file
391 2019-05-01 16:00    Raman and x-ray scattering study on correlated electron systems: two case examples file
390 2019-05-02 16:00    Anomalous optical properties of halide perovskites file
389 2019-05-03 11:00    Exotic Magnetism file
388 2019-05-08 16:00    Imaging valley dependent electron transport in 2D semiconductors file
387 2019-05-09 16:00    Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
386 2019-05-21 16:00    Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
385 2019-05-24 16:00    Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates file
384 2019-05-30 16:00    Tuning the excitonic properties of semiconductors with light-matter interactions file
383 2019-05-31 11:00    Cavity QED with Spin Qubits file
382 2019-06-04 17:00    Stochastic nature of bacterial eradication using antibiotics file
381 2019-06-12 15:00    The relation between free and interacting fermionic SPT phases file
380 2019-06-17 10:30    Chiral Spintronics file
379 2019-06-24 11:00    Topological photonic anomalies file
378 2019-06-27 14:00    Gapless Kitaev Spin Liquid to Loop and String Gases file
377 2019-06-28 13:30    Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures file
376 2019-06-28 14:00    1st Research-exchange meeting of computational material physics file
375 2019-07-03 15:00    Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file