visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2023-05-26 11:00 
연사  
장소 E6-2 #1323 
* Title: Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures
 
* Speaker: 이형우 (아주대학교 물리학과 교수)
 
* Date: 2023. 5. 26.(금) 11:00
 
* Place: E6-2 #1323
 
* Abstract
Exploiting oxygen vacancies has emerged as a versatile tool to tune the electronic and optoelectronic properties of complex oxide heterostructures. For the precise manipulation of the oxygen vacancy point defects, the capability of directly probing the defect distribution in nanoscale is essential, but still lacking. In this talk, first, the charge trapping behavior of oxygen vacancies in oxide heterostructures will be introduced. The stochastic charge trapping of the oxygen vacancies results in the characteristic carrier number fluctuation. We employ a classical spectral analysis method to interpret the carrier number fluctuation phenomena. Second, it will be shown that the spectral analysis method can probe the ionization state distribution of oxygen vacancies in oxide heterostructures. Based on the capability and limitation of the classical spectral analyses, lastly, we suggest a novel approach of the machine leaning-assisted spectral analysis method. The specifically-designed machine learning model allow us to evaluate the spatial distribution of the ionized oxygen vacancies from current noise signals. The correlation between the ionization state distribution of the oxygen vacancies and the stochastic charge trapping behavior will be discussed. Our works introduce a powerful strategy to quantitatively probe the spatial distribution of point defects in oxide heterostructures with nm-scale precision.
 
Attached: C.V
Inquiry: Prof. Se Kwon Kim(sekwonkim@kaist.ac.kr) / Prof. Hee Jun Yang (h.yang@kaist.ac.kr)
번호 날짜 연사 제목
공지 2025-04-29 10:00  Dr. Yeonju Go (Brookhaven National Laboratory)  Exploring the Hottest Matter in the Universe: Quark-Gluon Plasma through Hard Probes and Artificial Intelligence
공지 2025-05-01 16:00  Dr. Inwook Kim (Lawrence Livermore National Laboratory)  BSM Physics Search with Quantum Sensors
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
599 2010-02-14 16:00    Physics Colloquium - 2011 Spring file
598 2023-04-14 12:00    (응집물리 세미나)Exotic quantum phenomena in two-dimensional materials file
597 2023-05-12 11:00    (응집물리 세미나)Interlayer conductivity and plasmon in weakly coupled layered systems
596 2022-05-26 16:00    (광학분야 특별세미나)Topological photonic devices
595 2023-06-01 16:00    (광학분야 세미나)Quantum sensing using a squeezed light from hot Rb vapor
594 2015-03-09 16:00    Physics Colloquium : 2015 Spring file
593 2022-03-31 16:00    (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
592 2023-03-30 16:00    (광학분야 세미나)Scalable quantum entanglement in trapped-ions based quantum computer
591 2022-08-17 11:00    Robust Hamiltonian Engineering of Large Quantum Systems (큰 양자시스템의 견고한 해밀토니안 엔지니어링)
590 2010-02-08 16:00    Physics Ciolloquium : 2010 Spring file
589 2009-10-21 16:00    Interdimensional Universality of Dynamic Interfaces
588 2025-05-23 11:00  천상모 교수(한양대학교 물리학과)  Superconductivity in Topological Materials file
587 2025-04-28 16:00  지명국 (연세대 천문우주학과)  Galaxy Cluster Collisions as Cosmic Laboratories for Dark Matter file
586 2010-09-06 16:00    Physics Colloquium : 2010 Fall file
585 2025-04-11 11:00  조상연 박사(Wellman Center for Photomedicine)  Semiconductor Nanolaser Particles: The Building Blocks of Next-Generation, Highly Multiplexed Photonic Systems file
584 2017-03-21 16:00    Spring 2017: Physics Seminar Serises file
583 2025-04-04 12:00  조길영 교수(KAIST)  Theoretical Kaleidoscope of Quantum Material Research: From Quantum Field Theory and Quantum Information to Future Devices file
582 2022-05-16 16:00    Design synthetic topological matter with atoms and lights
581 2020-10-15 16:00    Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
580 2022-04-25 16:00    Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)