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)
525 2022-11-17 16:00    (광학분야 세미나) Ultrastructural and Spectroscopic Studies by Super-Resolution Fluorescence Microscopy
524 2022-09-22 16:00    (광학분야 세미나) Quasi-particle-like optical vortices in magnetic materials
523 2022-02-28 16:00    Spin-based training of optical microscopes
522 2022-12-09 11:00    [Update 세미나영상](응집물리 세미나) Single-shot measurements of strongly-correlated artificial molecular levels in semiconductor quantum dots file
521 2025-02-27 16:00  김도헌 교수(서울대)  Toward reliably coherent spin qubits in silicon file
520 2025-03-27 16:00  김건우 교수 (중앙대)  Quantum dynamics in synthetic spaces file
519 2023-03-24 11:00    (응집물리 세미나)Floquet simulators of topological surface states in isolation
518 2023-05-18 16:00    (광학분야 세미나)Dielectric metasurfaces for optimized optical system and spatial light modulators
517 2022-05-10 16:00    (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
516 2022-05-30 16:00    Light manipulation using 2D layered semiconductors
515 2025-03-13 16:00  고희동 교수(서울대)  분산관계 기반 파동 제어 구조물 설계 file
514 2022-09-29 16:00    (광학분야 세미나) Ultrafast THz Field-Induced Nonlinear Optics
513 2013-03-11 16:00    Physics Colloquium : 2013 Spring
512 2025-03-17 16:00  강동민 교수 (서울대)  String Theory, Quantum Field Theory and Physical Mathematics file
511 2023-05-31 16:00    [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
510 2022-01-18 14:00    Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
509 2024-10-02 12:00    Data-driven discovery of neural computations through brain-wide and cell-type-specific dynamical systems file
508 2016-06-14 16:00    Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction
507 2023-05-17 14:00    Optical Response in the multilayer thin films
506 2021-02-15 17:00    Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file