Quantum Thin-film Lab.

• Invented metal-organic pulsed laser deposition (MOPLD), a near-equilibrium thin film deposition technique enabling the growth of highly stoichiometric complex oxide thin films and heterostructures.

• Designed and constructed a custom-built thin film growth chamber integrating pulsed laser deposition (PLD) with atomic-layer control and ultra-high vacuum (UHV) chemical vapor deposition functionalities.

• Developed a method for precise control of point defects in complex oxide thin films (e.g., SrTiO3) by fine-tuning cation stoichiometry within its solubility limit.

• U.S. Patent Publication: C. B. Eom, J. W. Lee, “Metal-organic pulsed laser deposition for stoichiometric complex oxide thin films”, US 2020/0234953 A1, Oct. 06, 2020.

• Designed single-domain BaTiO3 ferroelectric thin films via interfacial symmetry engineering, incorporating anisotropic strain, symmetry lowering, and interfacial electrostatic potential modulation.

• Investigated interface-driven effects on polarization stability and domain configuration for non-volatile ferroelectric memory applications.

• Synthesized epitaxial VSe2 thin films on c-sapphire and Si substrates using a hybrid deposition system integrating PLD and thermal evaporation. 

(Collaborating with Prof. Sanghan Lee at GIST and 

 Prof. JongHoon Jung at Inha University)

• Achieved a 1T-to-2H phase transformation via post-annealing, resulting in room-temperature ferromagnetism in 2H-VSe2 for the first time in thin film form.

• Demonstrated that Se/V stoichiometry control and selenium vacancies are critical for tuning magnetic properties in 2D ferromagnetic ceramics.

• Constructed phase stability diagrams of GdBa2Cu3O7−δ and SmBa2Cu3O7−δ as a function of log(PO2) versus 1/T under low oxygen partial pressures (1–100 mTorr).

• Enhanced flux pinning properties in high-temperature superconducting films through combined thermodynamic and kinetic process optimization.

• Fabricated superconductor–insulator–superconductor (SIS) tunnel junctions using high-temperature superconducting materials for quantum information platforms.

• Engineered cryogenic insulation and high thermal conductivity coatings to support high-performance HTS magnets under extreme cryogenic conditions, advancing next-generation superconducting magnet systems.