EDUCATION

Doctor of philosophy, Theoretical Solid-State Physics

Computational Nano-Material Physics Laboratory

Department of Physics, Seoul National University, Seoul, Korea (Supervisor : Prof. Jaejun Yu)

First-principles effective Hamiltonian study of ferroelectric perovskite oxide superlattices.

• Discovering best combinations of transition-metal oxide nanostructures for enhanced ferreoelectric performance with using localized-phonon-Wannier functions

• Understanding surface reconstruction and electronic structure of nano-sized diamond and designing porous but hard nano-size clusters.

Master of Science, Physics, Seoul National University, Korea (Supervisor : Prof. Jaejun Yu)

Fullerene-like reconstructions of nano-diamond surfaces.

Bachelor of Science, Physics, Seoul National University, Korea (Supervisor : Prof. Yung-Woo Park)

Transport properties of conducting polymers.

RESEARCH EXPERIENCE

Assistant Professor, School of Energy & Chemical Engineering,  

Ulsan National Institute of Science & Technology (UNIST), Korea 

- Initiating “Quantum Materials Genome (QMG)” research for revolutionary materials design 

- Modeling photo-electro-chemical reactions on various catalytic oxides 

- Revealing novel spin-liquid and spin-ice systems via fostering geometric

Post-doctoral Fellow, Materials Science & Technology Division, Oak Ridge National Lab., USA

Dr. Randy Fishman

Modeling Coupled Spin-Lattice-Photon Dynamics in Transition-Metal Oxides

 -    Revealing magneto-electric couplings in organic-inorganic hybrid nanostructures by combining various models with quantum-mechanical calculations

-     Computational nano-optics for light-matter interactions by reproducing time-resolved Raman- and optical-spectroscopy in oxide materials by using linear-response theory

-     Understanding uni-directional light propagations and designing optical diode via light-spin-lattice interaction in transition-metal oxides

Post-doctoral Fellow, Department of Chemistry, Princeton University, USA

Professor Annabella Selloni

Computational Design of Molecular Reactions on Photoelectro-Catalystic Surfaces

-     Design of improved oxygen-reduction and oxygen-kinetic processes on quantum-paraelectric transition-metal oxides for effective water splitting, CO2 conversion, and fuel cells

-     Catalysts@ferroelectric core-shell nano-structures for breaking covalent- and hydrogen-bonds of molecules and accelerating charge- and proton-transfer dynamics in catalytic reactions

-     Control of surface doping characteristics (interstitial vs. substitution) and concentration to promote selective photo-catalytic reactions and increase photo-excited-carriers mobility

Post-doctoral Fellow, Condensed Matter Theory Group, Rutgers University, New Jersey, USA.

Professor  Karin M. Rabe

Initiating “Quantum Materials Genome (QMG)” research for revolutionary crystal engineering

-      Systematic understanding of hierarchical structure-property relationship digitalized by computation for quantum oxides, inspired by human genome research

• Designing Room-T ferroelectric-ferromagnetic transition-metal oxides through QMG

• Deigning ferromagnetism controllable by electric-field for energy-efficient memory

Visiting Scholar, University of California, Santa Barbara, USA.

Professor  Nicola Spaldin

Understanding complex oxides for HOMO-LUMO level engineering for functional nanomaterials

• Utilizing coupling between Jahn-Teller distortion and oxygen-octahedron rotation for the control of band-gap for improved photon absorption

• Strain-engineering of HOMO-LUMO level positions by controlling of Jahn-Teller distortion for allowing the molecules such as water to be both oxidized and reduced effectively

Research Intern, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India.

Professor  Umesh V. Waghmare

Effective Hamiltonian using localized phonon Wannier functions for the calculation of large-size ferroelectric nanostructures with ab-initio simulation

Expertise in VASP, SIESTA, Quantum ESPRESSO, ABINIT, Open-MX (LCAO) 

FERAM (MD simulation for bulk, thin-film, and nano-structure)