Wonhee Ko

TL;DR: This work reports the emergence of Dirac fermions in a fully tunable condensed-matter system—molecular graphene—assembled by atomic manipulation of carbon monoxide molecules over a conventional two-dimensional electron system at a copper surface and shows the existence within the system of linearly dispersing, massless quasi-particles accompanied by a density of states characteristic of graphene.

TL;DR: These findings provide an atomistic understanding of non-volatile switching and open a new direction in precision defect engineering, down to a single defect, towards achieving the smallest memristor for applications in ultra-dense memory, neuromorphic computing and radio-frequency communication systems.

TL;DR: Large-area, environmentally stable, single-crystal 2D gallium, indium and tin that are stabilized at the interface of epitaxial graphene and silicon carbide that demonstrate compelling superconducting properties are demonstrated.

TL;DR: An on-surface synthesis approach to forming atomically precise GNRs directly on semiconducting metal oxide surfaces and the formation of planar armchair GNRs terminated by well-defined zigzag ends is confirmed by scanning tunneling microscopy and spectroscopy, which reveal weak interaction between GNRs and the rutile titanium dioxide substrate.

TL;DR: Laser-synthesized graphene does not display some of the structural characteristics observed in EG grown by conventional thermal decomposition on SiC (0001), such as Bernal stacking and surface reconstruction of the underlying SiC surface.