visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-04-11 13:30 
일시 April 11 (Wed), 1:30pm 
장소 #1323 (E6-2, 1st fl.) 
연사 Dr. Yongsoo Yang 

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 장소 제목
244 2017-05-12 13:30  E6-2. 1st fl. #1323  Topological Dirac insulator
243 2022-05-13 16:00  자연과학동(E6-2) 1st fl. #1323  High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
242 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
» 2018-04-11 13:30  #1323 (E6-2, 1st fl.)  Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
240 2018-10-15 16:00  #1323, E6-2  Universal properties of macroscopic current-carrying systems file
239 2016-09-02 16:00  E6-2(1st fl) #1323  Quantum Electrical Transport in Topological Insulator Nanowires
238 2016-09-02 14:30  E6-2(1st fl.), #1323  Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
237 2023-12-14 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Superconducting qubits for large-scale quantum computers file
236 2023-04-13 11:00  Zoom  [High Energy Theory Seminar]Noninvertible Gauss Law and Axions
235 2015-12-01 16:00  E6-2, #1323  Introducing extra dimensions to spectroscopic studies of advanced quantum materials
234 2015-11-10 16:00  E6-2, #1323  Rapid heating of matter using high power lasers
233 2022-11-10 16:00  E6-2. 1st fl. #1323  Probing the Origin of Cosmic Infrared Background and Future Prospects with SPHEREx
232 2023-02-28 11:00  E6 Room(#1322)  Topotactic redox engineering toward novel material file
231 2018-10-16 10:00  #1323, E6-2  Capturing protein cluster dynamics and gene expression output in live cells file
230 2018-06-18 10:00  E6-2. 2nd fl. #2502  Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file
229 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
228 2023-09-26 16:00  E6-2, #2502  [High Energy Theory Seminar]A new step in interacting dark sector cosmologies
227 2016-03-11 16:00  E6-2. 1st fl. #1501  Jan. Switching handedness of of chiral solitons in Z4 topological insulators
226 2021-04-02 14:30  Online(Zoom)  Quantum computing and entanglement generation using trapped ions and photons
225 2021-05-14 14:30  Online seminar  Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file