visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2024-01-26 15:00 
일시 2024.01.26(Fri) 3:00pm 
장소 E6-2 #1323 
연사 :Prof. Sang Ho Oh (Department of Energy Engineering, Korea Institute of Energy Technology) 
물리학과 구성원분들께,
아래와 같이 세미나를 개최하오니 많은 참석 부탁드립니다.
 
- Speaker : Prof. Sang Ho Oh (Department of Energy Engineering, KENTECH Institute for Energy Materials and Devices, Korea Institute of
                Energy Technology)
- Date : 2024.01.26(Fri) 3:00pm
- Place : E6-2  #1323
- Title : "In-situ 4D-STEM studies on surface reconstruction and polarization switching of perovskite oxides"
- Abstract : 
4D STEM is an emerging technique in electron microscopy, enabling the acquisition of convergent electron beam diffraction (CBED) patterns in every pixels in STEM mode. This technique is versatile and finds many useful applications in materials science, where conventional TEM and STEM techniques are unable to characterize. For example, the quantitative interpretation of the CBED pattern can provide detailed information on the crystal symmetry and atomic positions at an Å level, allowing the precise determination of lattice strain and atomic displacement. 4D STEM data, acquired at an optimized condition for ptychography and treated by iterative phase reconstruction algorithms, can be used for atomic-scale potential and charge density mapping. Further, the ptychography of 4D STEM can achieve a good depth resolution in the range of ~2-5 nm once the multislice wave propagation is incorporated into the iterative phase reconstruction process. If all these capabilities of 4D STEM is combined with in-situ TEM experiments, such as heating and electrical biasing, tremendous breakthrough can made in various fields of materials science and solid-state physics. In this seminar, some of our recent (unpublished) works on the surface reconstruction of SrTiO3 (001) at high temperatures and the mapping of field-induced polarization switching of relaxor ferroelectric Ba0.5Sr0.5TiO3 thin films will be presented. 
번호 날짜 장소 제목
29 2019-12-13 13:00  #2501, E6-2  Computational Material Designs: Current Status and Future Directions file
28 2016-04-28 15:00  #2501(E6-2. 2nd fl.)  Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
27 2016-10-18 13:30  1st fl. #1323(E6-2)  "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
26 2024-01-25 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP seminars] Detecting Gravitational Waves by Elecromagnetic Cavity
25 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
24 2022-09-30 16:00  E6-2. 1st fl. #1323 & Zoom  Spin-orbit torque-based spintronic devices file
23 2018-02-12 15:00  #C303, (Creation Hall 3F, KAIST Munji Campus)  The recent result of XMASS Experiment
22 2016-05-11 16:00  E6-2. #1323(1st fl.)  The quest for novel high-temperature superconductors---Prospects and progress in iridates
21 2019-06-28 14:00  E6-2, #1322  1st Research-exchange meeting of computational material physics file
20 2016-11-11 16:00  #1323(E6-2. 1st fl.)  Dirac fermions in condensed matters
19 2016-01-11 16:00  E6-2, #1323  Mott Physics in the Strong Spin-Orbit Coupling Regime
18 2016-04-05 16:00  E6-2. 1st fl. #1322  A new impurity solver for multi-orbital systems: adaptive truncation of the Hilbert space
17 2016-04-06 15:30  E6-2, RM #1323  Superconducting Quantum Interference Devices for Precision Detection
16 2016-12-12 13:30  1:30p.m. #1323(E6-2. 1st fl.)  “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors”
15 2023-10-04 16:00  E6-2, #2502  [High-Energy Theory Seminar] Moving towards quantum technologies: the case of quantum batteries
14 2019-10-25 15:00  #1323, E6-2  Physics Seminar file
13 2017-12-14 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  Exploring the Universe via GWs in the era of multi-messenger astronomy
12 2021-04-19 19:00  Zoom webinar  Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
11 2023-01-12 16:00  E6-2 #1323  Spin wavepackets in the Kagome ferromagnet Fe3Sn2: propagation and precursors
10 2024-03-28 11:00  E6, #2501  Geometric characterization of thermoelectric performance of two-dimensional quadratic band-crossing semimetals