• 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 In this seminar, some of our recent (unpublished) works on the surface reconstruction of SrTiO3 (001) at high temperatures and the mapping of field-induced polarization switching of relaxor ferroelectric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
559 2018-09-07 15:00  학술문화관 (E9), 2층 양승택 오디토리움  Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
558 2016-05-17 11:00  창의학습관(E11), 406호  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
557 2022-05-13 16:00  자연과학동(E6-2) 1st fl. #1323  High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
556 2021-11-02 16:00  자연과학동(E6-2) #1323  Metrology of Band Topology via Resonant Inelastic X-ray Scattering file
555 2017-12-13 13:30  자연과학동 대형강의실 (1501호)  KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
554 2021-05-27 16:00  온라인  찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
553 2018-08-01 11:00  양분순 빌딩 (E16-1) 207호  Future of AI: Is the brain a computer? file
552 2022-04-01 16:00  Zoom webinar  High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
551 2020-09-14 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond (Third Forum) file
550 2022-05-13 14:30  Zoom webinar  Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
549 2020-09-22 09:30  Zoom webinar  Physics and applications of soliton microcombs(Quantum- & Nano-Photonics) file
548 2021-06-08 10:00  Zoom webinar  Photonic crystal devices for sensing file
547 2020-08-17 20:00  Zoom webinar  Using magnetic tunnel junctions to compute like the brain file
546 2021-04-19 19:00  Zoom webinar  Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
545 2020-08-25 20:00  Zoom webinar  KAIST Global Forum for Spin and Beyond (Second Forum) file
544 2020-09-28 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond(Fourth Forum) file
543 2021-12-03 16:00  Zoom webinar  Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
542 2021-05-17 17:00  Zoom webinar  Spin current generation and detection in uniaxial antiferromagnets file
541 2021-12-03 14:30  Zoom webinar  Topological Spin Textures: Skyrmions and Beyond file
540 2021-04-09 10:00  Zoom webinar  Integrated Lithium Niobate Photonics file