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Showing 1–11 of 11 results
Advanced filters: Author: Cheol-Joo Kim Clear advanced filters

  • Interlayer electronic states in twisted bilayer graphene are characterized by flat-band regions hosting many-body electronic effects. Here, the authors observe two-photon photoluminescence excitation and excited-state absorption spectra on graphene containing a variety of twist angles to access the dark exciton transitions and estimate the exciton binding energy.

    • Hiral Patel
    • Lujie Huang
    • Matt W. Graham
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • Under strong laser fields, materials exhibit extreme non-linear optical response, such as high harmonic generation. These higher harmonics provide insights into electron behaviour in materials in sub-laser cycle timescale. Here, Cha et al study higher harmonic generation resulting from the laser driven motion of massless Dirac fermions in graphene.

    • Soonyoung Cha
    • Minjeong Kim
    • Jonghwan Kim
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-10

  • Mirror twin boundaries in monolayer MoS2—line defects with reflection-mirroring symmetry—are one-dimensionally metallic. In this work, the authors fabricate these mirror twin boundary networks by epitaxity and incorporate them into ultrascaled 2D transistor circuits as gate electrodes.

    • Heonsu Ahn
    • Gunho Moon
    • Moon-Ho Jo
    Research
    Nature Nanotechnology
    Volume: 19, P: 955-961

  • Graphene layers can be placed on top of each other with accurate twisting angles and show a remarkably high circular dichroism.

    • Cheol-Joo Kim
    • A. Sánchez-Castillo
    • Jiwoong Park
    Research
    Nature Nanotechnology
    Volume: 11, P: 520-524

  • A new chemical vapour deposition method enables transition-metal dichalcogenide (TMD) monolayers to be grown directly on insulating silicon dioxide wafers, demonstrating the possibility of wafer-scale batch fabrication of high-performance devices with TMD monolayers.

    • Kibum Kang
    • Saien Xie
    • Jiwoong Park
    Research
    Nature
    Volume: 520, P: 656-660

  • This versatile and scalable ‘patterned regrowth’ fabrication process produces one-atom-thick sheets containing lateral junctions between electrically conductive graphene and insulating hexagonal boron nitride, paving the way for flexible, transparent electronic device films.

    • Mark P. Levendorf
    • Cheol-Joo Kim
    • Jiwoong Park
    Research
    Nature
    Volume: 488, P: 627-632

  • Twisted bilayer graphene is epitaxially grown between two adjacent Cu(111) surfaces, with the twist angle controlled by the rotation of the Cu foils as designed.

    • Seong-Jun Yang
    • Cheol-Joo Kim
    News & Views
    Nature Materials
    Volume: 21, P: 1215-1216

  • Relativistic Dirac fermions can be locally confirmed in nanoscale graphene quantum dots using electrostatic gating, and directly imaged using scanning tunnelling microscopy before escaping via Klein tunnelling.

    • Christopher Gutiérrez
    • Lola Brown
    • Abhay N. Pasupathy
    Research
    Nature Physics
    Volume: 12, P: 1069-1075

  • Scanning tunnelling microscopy shows how the interaction between electrons in graphene and atomic vacancies in a copper substrate produces Kekulé ordering — an electronic phase that breaks chiral symmetry.

    • Christopher Gutiérrez
    • Cheol-Joo Kim
    • Abhay N. Pasupathy
    Research
    Nature Physics
    Volume: 12, P: 950-958