김국태 (KOOK TAE KIM)
arete0614@gmail.com
kooktaekim@postech.ac.kr
RESEARCH INTEREST
● Resonant x-ray scattering of topological domain structures such as vortices and skyrmions
● Time-resolved x-ray scattering of topological domain structures to study ultra-fast domain dynamics and to study possible applications
EDUCATION
● Bachelor Degree of Physics (2017.03.01)
Dept. of Physics, Soongsil University Seoul, Republic of Korea
● Doctoral Degree of Physics (2023.03.01), Advisor : Prof. Dong Ryeol Lee
Dept. of Physics, Soongsil University Seoul, Republic of Korea
Thesis : “A study on the polar chiral structure of ferroelectrics using resonant elastic x-ray scattering”
RESEARCH EXPERIENCE
Postdoctoral Fellow
Advisor : Prof. Chang Yong Song group (Femtosecond X-ray Diffraction & Imaging),
Dept. of Physics, POSTECH Pohang, Rep. of Korea
Postdoctoral Fellow
Advisor : Prof. Dong Ryeol Lee group (X-ray resonant scattering lab),
Dept. of Physics, Soongsil University Seoul, Rep. of Korea
PRESENTATION
Invited
Conference : PAL-XFEL user meeting Pohang, Rep. of Korea
Session : Ultrafast photo-induced Dynamics in Condensed Matter at PAL-XFEL
Title : "Time-resolved x-ray scattering study on polar vortex structure using XFEL"
Conference : International conference on advanced materials and devices (ICAMD 2023) Jeju, Rep. of korea
Session : IIBS International Symposium:Recent advances in Functional Materials | SSU_IIBS
Title : ”Time-resolved soft x-ray resonant scattering study on dynamics of polar vortex structures induced by femtosecond laser pulses”
Conference : The 2nd PAL-XFEL user meeting (2022) Pohang, Rep. of Korea
Title :”Collective ferroelectric domain dynamics in oxide multilayer excited by laser-induced acoustic phonon studied by time-resolved soft x-ray resonant scattering”
Oral
Conference : The Korean Physics Society Spring meeting 2024 Daejeon, Rep. of Korea
Title : “Strain dynamics of polar vortices studied by x-ray free electron laser"
Conference : The Korean Physics Society Fall meeting 2022 Busan, Rep. of Korea
Title : “Study on polar chiral structures of ferroelectrics using resonant elastic x-ray scattering(REXS)”
Conference : The Korean Physics Society Fall meeting 2020 Online, Rep. of Korea
TItle : “Polarized x-ray resonant scattering from the chiral structures of the electric quadrupole moments”
Poster
Conference : The Korean Physics Society Spring meeting 2020 Online, Rep. of Korea
TItle : ”Determination of Ti K-edge absorption spectrum in an ultrathin BaTiO3 film on a SrTiO3 substrate using resonant x-ray reflectivity”
AWARDS
● Best Presentation Award, The Korean Physical Society Fall Meeting 2020
● Soongsil University Interdisciplinary Seminar, Natural Science Awards 2022
PUBLICATION LIST
● B.H.Cha, K.T.Kim and D.R.Lee Quasi-2D and 3D phase-field simulation studies of polar vortex domain structures for high-density domain engineering. Sci Rep 14, 27561, 2024.
● J.Y.Kee, K.T.Kim, I.H.Lee et. al. Additive roles of antiferromagnetically coupled elements in the magnetic proximity effect in the GdFeCo/Pt system. Sci Rep 14, 9476, 2024
● K.T.Kim, and M.R.McCarter et.al., Chiral structures of electric polarization vectors quantified by X-ray resonant scattering. Nat Commun 13, 1769, 2022
● M.R.McCarter, and K.T.Kim et.al., Structural chirality of polar skyrmions probed by resonant elastic x-ray scattering, Phys.Rev.Lett 129, 247601, 2022
● K.T.Kim et.al., Origin of circular dichroism in resonant elastic x-ray scattering from magnetic and polar chiral structures, Phys.Rev.B 106,035116,2022
● K.T.Kim and D.R.Lee, Probabilistic parameter estimation using a Gaussian mixture density network:application to x-ray reflectivity data curve fitting, J.Appl.Cryst 54, 1572-1579, 2021
● K.T.Kim and D.O.Kim et.al., X-ray reflectivity data analysis using Bayesian inference:The study of induced Pt magnetization in Pt/Co/Pt, Current Applied Physics 30, 46-52 ,2021
● W.H.Jo and J.Y.Kee et.al., Structural measurement of electron-phonon coupling and electronic thermal transport across a metal-semiconductor interface, Sci.Rep 12, 16606, 2022
● Yeojin Lee et.al., IGZO synaptic thin-film transistors with embedded AlOx charge-trapping layers, Appl.Phys.Express 15 061005, 2022