visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2023-05-26 11:00 
일시 May. 26 (Fri) 11:00AM 
장소 E6-2 #1323 
연사 이형우 (아주대학교 물리학과 교수) 
* 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 장소 제목
493 2023-09-07 12:00  E6-2 #1323  2023 가을학기 광학분야 및 응집물리 특별세미나 전체 일정 file
492 2023-08-29 16:00  E6-2, #2502  [High Energy Theory Seminar] Towards string loop corrections in Calabi-Yau orientifold compactifications.
491 2023-08-24 12:00  E6-1 #1501  2023 가을학기 콜로키움 전체 일정 file
490 2023-08-24 11:00  E6, Rm#1323  Advancing magnonic metamaterials: spin waves in nanomagnetic arrays
489 2023-08-23 16:00  E6-2, #1322  [High Energy Theory Seminar] A spacetime tensor network for AdS3/CFT2
488 2023-07-26 10:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Am Expansive Search for Dark Matter with ADMX and DM Radio
487 2023-07-20 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
486 2023-07-19 16:00  E6-2, #1323  [High-Energy Theory Seminar]Deriving the Simplest Gauge-String Duality
485 2023-07-18 11:00  E6-2, #1323  Non-Hermitian Casimir Effect of Magnons
484 2023-07-14 11:00  E6-2 #1501  Interfaces engineering of thin film oxides
483 2023-07-12 11:00  E6-2, #1323  Study of spin-1/2 antiferromagnetic kagome Heisenberg model by symmetric projected entangled simplex states
482 2023-07-11 11:00  E6-2, #1323  Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
481 2023-07-10 16:00  E6, #1323  Electronic structures of magnetic and non-magnetic ordering in d- and f-electrons systems
480 2023-06-30 11:00  E6-6 #1501  The Dual Mode Quantum Computer file
479 2023-06-26 11:00  E6, Rm#1323  Quantum computing on magnetic racetracks with flying domain wall qubits
478 2023-06-23 11:00  E6-6, #119  Visualizing orbital quantum phenomena at room temperature
477 2023-06-22 16:00  E6-2,1323  [High Energy Physics Seminar] The Branes Behind Generalized Symmetry Operators
476 2023-06-22 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] The muon g-2 puzzle file
475 2023-06-16 13:00  E6-2, #2502  Quantum critical states under extreme conditions
474 2023-06-15 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Cryogenic electronics for ion traps file