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 In this seminar, some of our recent (unpublished) works on the surface reconstruction of SrTiO3 (001) at high temperatures and the mapping of field-induced polarization switching of relaxor ferroelectric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
529 2024-03-20 16:00  E6-2 #2502  [High-Energy Theory Seminar] Black hole states at finite N
528 2024-03-13 16:00  E6-2 #2502  [High-Energy Theory Seminar] The Schwarzschild Black Hole from Perturbation Theory to all Orders
527 2024-03-08 11:00  E6-2 #1323  2024 봄학기 광학분야 및 응집물리 특별세미나 전체 일정 file
526 2024-03-07 16:00  Zoom  [CAPP seminars] Development of Superconducting Transition Edge Sensors at SRON file
525 2024-02-26 16:00  E6-1 #1501  2024 봄학기 콜로키움 전체 일정 file
524 2024-02-16 10:00  E6, #1323  Optical conductivity of superconducting states driven by Van Hove singularities
» 2024-01-26 15:00  E6-2 #1323  In-situ 4D-STEM studies on surface reconstruction and polarization switching of perovskite oxides
522 2024-01-25 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP seminars] Detecting Gravitational Waves by Elecromagnetic Cavity
521 2024-01-24 15:00  E6-2 #1323  Determination of single molecule loading rate during mechanotransduction file
520 2024-01-16 16:00  E6-2, #2502  [High Energy Theory Seminar] Towards quantum black hole microstates
519 2024-01-16 14:00  E6-2, #1323  Dimer Physics and Superconductivity in La3Ni2O7
518 2024-01-03 11:00  E6-2, #1323  Interplay of Strong Correlations, Topology, and Disorder in 2D Quantum Matters
517 2023-12-19 16:00  E6-2, #1323  [High Energy Theory Seminar] Non-invertible symmetries, leptons, quarks, and why multiple generations
516 2023-12-14 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Superconducting qubits for large-scale quantum computers file
515 2023-12-08 10:30  E6-2, Rm#2502  Novel transport phenomena in insulators
514 2023-11-30 10:30  E6-2, #1322  [High-Energy Theory Seminar] 3d-3d correspondence and 2d N = (0,2) boundary conditions
513 2023-11-29 10:00  Zoom  [High Energy Theory Seminar] Averaged null energy and the renormalization group
512 2023-11-23 16:00  E6-2(Natural Science B/D). 1st fl. #1323  Deciphering the Enigma of Quantum Materials by X-ray Scattering and Spectroscopy
511 2023-11-22 16:00  E6-2, #2502  [High Energy Theory Seminar] Renormalization and the Hierarchy Problem
510 2023-11-22 10:00  E6-2, #5301 & zoom  [High Energy Theory Seminar] Exact Quantum Algorithms to Recognize Quantum Phases of Matter