167 citations · 417 across the 17 of their papers we have counts for
17 papers
Temperature-dependent -electron evolution in CeCoIn via a comparative infrared study with LaCoIn
Myounghoon Lee, Yu-Seong Seo, Seulki Roh +6
We investigated CeCoIn and LaCoIn single crystals, which have the same HoCoGa-type tetragonal crystal structure, using infrared spectroscopy. However, while CeCoIn…
Doping-dependent superconducting physical quantities of K-doped BaFeAs obtained through infrared spectroscopy
Seokbae Lee, Yu-Seong Seo, Seulki Roh +3
We investigated four single crystals of K-doped BaFeAs (Ba-122), BaKFeAs with = 0.29, 0.36, 0.40, and 0.51, using infrared spectroscopy. We explored…
Electron-hole symmetry in quasiparticle spectral weight of cuprates observed via infrared and photoemission spectroscopy
Myounghoon Lee, Dongjoon Song, Yu-Seong Seo +4
We performed an optical spectroscopy study on single crystals of PrLaCeCuO (PLCCO) to revisit the electron-hole asymmetry, which has been understood as a…
Evolution of electronic structure of Ru-doped single-crystal iridiates, SrIrRuO
Seokbae Lee, Yu-Seong Seo, Eilho Jung +7
We investigated Ru-doped single-crystal 5 iridiates, SrIrRuO, at three different doping concentrations ( 0.01, 0.07 and 0.10) using optical spectrosco…
Defect engineering of magnetic ground state in EuTiO epitaxial thin films
Dongwon Shin, Inseo Kim, Sehwan Song +5
Atomistic defect engineering through the pulsed laser epitaxy of perovskite transition metal oxides offers facile control of their emergent opto-electromagnetic and energy properti…
Color of Copper/Copper oxide
Su Jae Kim, Seonghoon Kim, Jegon Lee +16
Stochastic inhomogeneous oxidation is an inherent characteristic of copper (Cu), often hindering color tuning and bandgap engineering of oxides. Coherent control of the interface b…
Correlation effects obtained from optical spectra of Fe-pnictides using an extended Drude-Lorentz model analysis
Seokbae Lee, Yu-Seong Seo, Seulki Roh +3
We introduce an analysis model, an extended Drude-Lorentz model, and apply it to Fe-pnictide systems to extract their electron-boson spectral density functions (or correlation spec…
Magnetic-order-driven metal-insulator transitions in the quasi-one-dimensional spin-ladder compounds BaFeS and BaFeSe
Seulki Roh, Soohyeon Shin, Jaekyung Jang +9
The quasi-one-dimensional spin ladder compounds, BaFeS and BaFeSe, are investigated by infrared spectroscopy and density functional theory (DFT) calculations. We ob…
Selective Etching of Hexagonal Boron Nitride by High-Pressure CF4 Plasma for Individual One-dimensional Ohmic Contacts to Graphene Layers
Yuta Seo, Satoru Masubuchi, Eisuke Watanabe +5
We describe a technique for making one-dimensional ohmic contacts to individual graphene layers encapsulated in hexagonal boron nitride (h-BN) using CF4 and O2 plasmas. The high et…
Deep-Learning-Based Image Segmentation Integrated with Optical Microscopy for Automatically Searching for Two-Dimensional Materials
Satoru Masubuchi, Eisuke Watanabe, Yuta Seo +5
Deep-learning algorithms enable precise image recognition based on high-dimensional hierarchical image features. Here, we report the development and implementation of a deep-learni…
Oxygen vacancy-induced structural evolution of SrFeO epitaxial thin film from brownmillerite to perovskite
Seulki Roh, Seokbae Lee, Myounghoon Lee +8
We investigated SrFeO thin films on a SrTiO (001) substrate prepared via pulsed laser epitaxy using an optical spectroscopy technique. The oxygen vacancy level () wa…
Revisiting optical properties of MgB with a high-quality sample prepared by a HPCVD method
Yu-Seong Seo, Jae Hak Lee, Won Nam Kang +1
We investigated a high-quality MgB thin film with a thickness of 1000 nm on an AlO substrate using optical spectroscopy. We measured the reflectance spectra…
Temperature-dependent evolutions of excitonic superfluid plasma frequency in a srong excitonic insulator candidate, TaNiSe
Yu-Seong Seo, Man Jin Eom, Jun Sung Kim +3
We investigate an interesting anisotropic van der Waals material, TaNiSe, using optical spectroscopy. TaNiSe has been known as one of the few excitonic insu…
Determination of the Local Symmetry and the Multiferroic-ferromagnetic Crossover in Ni3-xCoxV2O8 by using Raman Scattering Spectroscopy
Yu-Seong Seo, Sun-Hwa Kim, Jai Seok Ahn +1
Comprehensive vibrational studies on the multiferroic-to-normal-ferromagnetic crossover in isostructural Ni3-xCoxV2O8 (NCVO, x = 0 - 3.0) are performed using Raman scattering spect…
Soft Modes and Local Structural Transitions in Pb-free Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3 (x = 0.5): Pressure- and Temperature-dependent Raman Studies
Yu-Seong Seo, Jai Seok Ahn, Il-Kyoung Jeong
We report our Raman studies of a new lead-free relaxor ferroelectrics, Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCTZO). The Raman modes of BCTZO are compared with those of BaTi0.8Zr0.2O3 (BTZO),…
First-principles Investigations on Polytypes of BaTiO3: Hybrid Calculations and Pressure Dependences
Yu-Seong Seo, Jai Seok Ahn
We report our first-principles investigations on three polytypes of BaTiO3 (BTO): a paraelectric phase with cubic Pm-3m structure and two ferroelectric (FE) phases with tetragonal…
Ab-initio studies on the phonons of BaTiO3 polytypes: pressure dependences with a hybrid functional
Yu-Seong Seo, Jai Seok Ahn
We report the first principles investigations on the phonons of three polytypes of BaTiO3 (BTO): paraelectric (PE) cubic Pm-3m and two ferroelectric (FE) phases, tetragonal P4mm an…