60 citations · 194 across the 19 of their papers we have counts for
20 papers
Visualizing Berry curvature in a Floquet-Chern insulator
Younsik Kim, Rishi Acharya, Hannah E. Aguirre +3
Circularly polarized light can open a topological gap in a gapless Dirac system, creating a Floquet-Chern insulator. However, its Berry curvature has not been directly resolved. He…
Strain-tuned orbital-dependent electronic correlations in FeTe thin films
Hyunjee Song, Sangjae Lee, Keun-Yeol Park +8
Iron chalcogenides exhibit rich phenomena which are governed by orbital-dependent electronic interactions and strong electronic correlation. In particular, many studies have explor…
Probabilistic denoising for reliable signal extraction in spectroscopy
Younsik Kim, Changyoung Kim
While deep learning offers powerful capabilities for scientific research, its application is often hindered by a lack of quantitative reliability. To address this, we introduce a p…
Plasmon-driven electron-hole pair formation in a non-equilibrium Fermi liquid
Rishi Acharya, Eli Gerber, Nina Bielinski +13
Collective modes in Fermi liquids are usually regarded as dissipation channels that relax electronic excitations through Landau damping. Whether such modes can instead mediate the…
Magnetic-fluctuation-driven suppression of spin-orbit hybridization in the surface ferromagnet GdAg/Ag(111)
Ryo Noguchi, Jongkeun Jung, Younsik Kim +2
Magnetic materials hosting topological band structures have attracted intense interest due to the interplay between magnetism and spin-orbit coupling (SOC). Here, using temperature…
Superconductivity in Isolated Single Copper Oxygen Plane
Youngdo Kim, Byeongjun Gil, Sehoon Kim +7
One of the central questions in cuprate superconductivity is if superconductivity can exist in an isolated single CuO plane without any interlayer coupling. There have been num…
Low-dimensionality-induced tunable ferromagnetism in SrRuO ultrathin films
Jinyoung Kim, Minjae Kim, Donghan Kim +5
Quantum materials near electronic or magnetic phase boundaries exhibit enhanced tunability, as their emergent properties become highly sensitive to external perturbations. Here, we…
Fragility of Topology under Electronic Correlations in Iron Chalcogenides
Younsik Kim, Junseo Yoo, Sehoon Kim +5
The interplay between electronic correlations and topology is a central topic in the study of quantum materials. In this work, we investigate the impact of the orbital-selective Mo…
Pedagogical approach to anomalous position and velocity
Younsik Kim, Suk Bum Chung, Changyoung Kim
In this work, we discuss a pedagogical method in deriving the expressions for anomalous position and velocity. While we follow the steps used in optics in the derivation of the gro…
Coupling between electrons and charge density wave fluctuation and its possible role in superconductivity
Yeonghoon Lee, Yeahan Sur, Sunghun Kim +12
In most of charge density wave (CDW) systems of different material classes, ranging from traditional correlated systems in low-dimension to recent topological systems with Kagome l…
Electric control of two-dimensional Van Hove singularity in oxide ultra-thin films
Donghan Kim, Younsik Kim, Byungmin Sohn +4
Divergent density of states (DOS) can induce extraordinary phenomena such as significant enhancement of superconductivity and unexpected phase transitions. Moreover, van Hove singu…
Deep learning-based denoising for fast time-resolved flame emission spectroscopy in high-pressure combustion environment
Taekeun Yoon, Seon Woong Kim, Hosung Byun +3
A deep learning strategy is developed for fast and accurate gas property measurements using flame emission spectroscopy (FES). Particularly, the short-gated fast FES is essential t…
Kondo interaction in FeTe and its potential role in the magnetic order
Younsik Kim, Minsoo Kim, Min-Seok Kim +16
Finding d-electron heavy fermion (HF) states has been an important topic as the diversity in d-electron materials can lead to many exotic Kondo effect-related phenomena or new stat…
Heteroepitaxial control of Fermi liquid, Hund metal, and Mott insulator phases in the single-atomic-layer limit
Jeong Rae Kim, Byungmin Sohn, Hyeong Jun Lee +16
Interfaces between dissimilar correlated oxides can offer devices with versatile functionalities. In that respect, manipulating and measuring novel physical properties of oxide het…
Observation of spin-dependent dual ferromagnetism in perovskite ruthenates
Sungsoo Hahn, Byungmin Sohn, Minjae Kim +10
We performed in-situ angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES (SARPES) experiments to investigate the relationship between electronic band structur…
Observation of metallic electronic structure in a single-atomic-layer oxide
Byungmin Sohn, Jeong Rae Kim, Choong H. Kim +11
Correlated electrons in transition metal oxides (TMOs) exhibit a variety of emergent phases. When TMOs are confined to a single-atomic-layer thickness, experiments so far have show…
phonon anomaly driven by Fermi surface instability at intermediate temperature in YBaCuO
Dongjin Oh, Dongjoon Song, Younsik Kim +5
We performed temperature- and doping-dependent high-resolution Raman spectroscopy experiments on YBaCuO to study phonons. The temperature dependence…
Deep learning-based statistical noise reduction for multidimensional spectral data
Younsik Kim, Dongjin Oh, Soonsang Huh +13
In spectroscopic experiments, data acquisition in multi-dimensional phase space may require long acquisition time, owing to the large phase space volume to be covered. In such case…
Observation of Kondo hybridization with an orbital-selective Mott phase in 4d Ca2-xSrxRuO4
Minsoo Kim, Junyoung Kwon, Choong H. Kim +12
The heavy fermion state with Kondo-hybridization (KH), usually manifested in f-electron systems with lanthanide or actinide elements, was recently discovered in several 3d transiti…
Sign-tunable anomalous Hall effect induced by two-dimensional symmetry-protected nodal structures in ferromagnetic perovskite oxide thin films
Byungmin Sohn, Eunwoo Lee, Se Young Park +16
Magnetism and spin-orbit coupling (SOC) are two quintessential ingredients underlying novel topological transport phenomena in itinerant ferromagnets. When spin-polarized bands sup…