Wonhee Ko User Contact 865.241.4415 | KOWONHEE@ORNL.GOV All Publications Observation of single-defect memristor in an MoS2 atomic sheet Realizing gapped surface states in the magnetic topological insulator MnBi2xSbxTe4 Rational synthesis of atomically precise graphene nanoribbons directly on metal oxide surfaces Interplay between Topological States and Rashba States as Manifested on Surface Steps at Room Temperature Atomic-Scale Andreev Probe of Unconventional Superconductivity... Emergence of distinct electronic states in epitaxially-fused PbSe quantum dot superlattices Exploration of two surfaces observed in Weyl semimetal BaMnSb2 Noncontact Andreev Reflection as a Direct Probe of Superconductivity on the Atomic Scale Resistivity of Surface Steps in Bulk-Insulating Topological Insulators Understanding Heterogeneities in Quantum Materials Selective Antisite Defect Formation in WS2 Monolayers via Reactive Growth on Dilute W-Au Alloy Substrates Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2 Statistical detection of Josephson, Andreev, and single quasiparticle currents in scanning tunneling microscopy van der Waals Epitaxy Growth of Bi2Se3 on a Freestanding Monolayer Graphene Membrane: Implications for Layered Materials and ... Unidirectional growth of graphene nano-islands from carbon cluster seeds on Ge(1 1 0) Magnetic states of atomic vacancies in graphite probed by scanning tunneling microscopy Facile Size-Selective Defect Sealing in Large-Area Atomically Thin Graphene Membranes for Sub-Nanometer Scale Separations Atomically thin half-van der Waals metals enabled by confinement heteroepitaxy Enhancing the local conductivity of Cu films using temperature-assisted agglomerated Cu nanostructures Atomically Precise PdSe 2 Pentagonal Nanoribbons AtomicScale Manipulation and In Situ Characterization with Scanning Tunneling Microscopy Edge states and ballistic transport in zigzag graphene ribbons: The role of SiC polytypes Accessing the Intrinsic Spin Transport In a Topological Insulator by Controlling the Crossover of Bulk-to-surface Conductance Tip-induced local strain on MoS2/graphite detected by inelastic electron tunneling spectroscopy Detection of the Spin-Chemical Potential in Topological Insulators Using Spin-Polarized Four-Probe STM Key Links Curriculum Vitae Organizations Physical Sciences Directorate User Facilities Center for Nanophase Materials Sciences Nanomaterials Characterization Section Scanning Tunneling Microscopy Group
