Jeonghwan Ahn Contact AHNJ1@ORNL.GOV All Publications Exploring interlayer coupling in the twisted bilayer PtTe2 Stacking Faults and Topological Properties in MnBi2Te4: Reconciling Gapped and Gapless States Structural Stability of Graphene-Supported Pt Layers: Diffusion Monte Carlo and Density Functional Theory Calculations Procedures for Assessing the Stability of Proposed Topological Materials Key Links Organizations Physical Sciences Directorate Materials Science and Technology Division Materials Theory, Modeling and Simulation Section Materials Theory Group