We use Fourier transform infrared (FTIR) spectrometers and a monochromatic type optical spectrometer to cover a broad spectral range from far infrared (FIR) through ultraviolet (UV). We investigate low-lying (or intraband) optical excitations, characteristic collective modes including pure and hybrid phonon modes, and electronic (interband) transitions of various novel quantum material systems. The quantum material systems would be
Unconventional superconductors: High-temperature superconductors (copper oxides and Fe-pnictides) and heavy fermion systems
Strongly Correlated electron systems: bulk d- or f- electron systems and 3d transition metal oxide superlattice systems
Low-dimensional system: graphene, graphite, transition metal dichalcogenides (TMD), copper thin films etc.
Photovoltaic materials: organic solar cells.
We also would like to contribute other research areas of science such as astrophysics by sharing my spectroscopy technique and knowledge through close collaborations.
학력
(PhD) 2001 University of Florida, Gainesville, Florida, USA
약력/경력
2011 Sept - present Professor, Sungkyunkwan University
2009 Mar - 2011 Aug Assistant Professor, Pusan National University
2007 Aug - 2009 Feb Postdoctoral Research Associate, University of Florida, USA
2005 Sept - 2007 July Research Scientist, McMaster University, Canada
2003 Sept - 2005 Aug Research Associate, McMaster University, Canada
2001 Sept - 2003 Aug Postdoctoral Fellow, McMaster University, Canada
2001 May - 2001 Aug Postdoctoral Fellow, University of Florida, USA
학술지 논문
(2025)
Optical properties of RCd3P3 (R: Ce or La) compounds: insulator–metal transition induced by displacement of atoms in the unit cell.
NPG ASIA MATERIALS.
17,
2025
(2025)
Effects of Ni irradiation on electron–phonon coupling and flux pinning in MgB2 film via Raman spectroscopy.
JOURNAL OF APPLIED PHYSICS.
138,
2025
(2025)
Pioneering energy storage using facing-target sputtered Al2O3 protection layer on Ni-rich NCM622 cathode for high-efficiency all-solid-state thin-film batteries.
CHEMICAL ENGINEERING JOURNAL.
522,
2025
(2025)
Observation of Magnetic Pseudogap Behavior in Phosphorus-Doped Silicon.
ADVANCED SCIENCE.
2025,
n
(2024)
Effect of C additives with 0.5 % in weight on structural, optical and superconducting properties of Ta–Nb–Hf–Zr–Ti high entropy alloy films.
JOURNAL OF ALLOYS AND COMPOUNDS.
1008,
2024
(2024)
Optical properties of popular dielectric substrate materials in a wide
spectral range from far-infrared to ultraviolet.
CURRENT APPLIED PHYSICS.
67,
2024
(2024)
Stray Light in 3D Porous Nanostructures of Single-Crystalline Copper Film.
Small Science.
2024,
2024
(2024)
Optical properties of LK-99 and Cu2S.
Progress in Superconductivity and Cryogenics (PSAC).
26,
2
(2024)
Emergence of flat bands and ferromagnetic fluctuations via orbital-selective electron correlations in Mn-based kagome metal.
NATURE COMMUNICATIONS.
15,
(2024)
Infrared spectroscopy of quantum materials.
CURRENT APPLIED PHYSICS.
66,
2023
(2024)
Infrared spectroscopic study on Nb-ion-irradiated MgB2 thin films.
CURRENT APPLIED PHYSICS.
66,
2024
(2024)
An inversion problem for optical spectrum data via physics‑guided machine learning.
SCIENTIFIC REPORTS.
14,
2024
(2024)
Solving inverse problems using normalizing flow prior: Application to optical spectra.
PHYSICAL REVIEW B.
109,
16
(2024)
Effect of Cd- and Sn-doping in CeCoIn5 on the hybridization gap and f -electron amplitude studied with infrared spectroscopy.
PHYSICAL REVIEW B.
109,
12
(2024)
Planckian behavior of cuprates at the pseudogap critical point simulated via flat electron-boson spectral density.
HELIYON.
10,
2024
(2023)
Role of electron-phonon coupling in the superconducting state of MgB2 polycrystals fabricated at different conditions.
CERAMICS INTERNATIONAL.
49,
21
(2023)
Roles of Fe-ion irradiation on MgB2 thin films: Structural, superconducting, and optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS.
968,
(2023)
Self-Oxidation Resistance of the Curved Surface of Achromatic Copper.
ADVANCED MATERIALS.
35,
42
(2023)
Geometrical Doping at the Atomic Scale in Oxide Quantum Materials.
ACS NANO.
17,
15
(2023)
Bosonic spectrum of a correlated multiband system, BaFe1.80Co0.20As2, obtained via infrared spectroscopy.
RESULTS IN PHYSICS.
50,
2023
발전기금
