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Visualizing and manipulating chiral interface states in a moiré quantum anomalous Hall insulator
Canxun Zhang, Tiancong Zhu, Salman Kahn +7
Moiré systems made from stacked two-dimensional materials host novel correlated and topological states that can be electrically controlled via applied gate voltages. We have used t…
Imaging gate-induced molecular melting on a graphene field-effect transistor
Franklin Liou, Hsin-Zon Tsai, Zachary A. H. Goodwin +9
Solid-liquid phase transitions are fundamental physical processes, but atomically-resolved microscopy has yet to capture both the solid and liquid dynamics for such a transition. W…
Imaging the electron charge density in monolayer MoS2 at the Ångstrom scale
Joel Martis, Sandhya Susarla, Archith Rayabharam +15
Four-dimensional scanning transmission electron microscopy (4D-STEM) has recently gained widespread attention for its ability to image atomic electric fields with sub-Ångstrom spat…
Local spectroscopy of a gate-switchable moiré quantum anomalous Hall insulator
Canxun Zhang, Tiancong Zhu, Tomohiro Soejima +7
In recent years, correlated insulating states, unconventional superconductivity, and topologically non-trivial phases have all been observed in several moiré heterostructures. Howe…
Mapping Charge Excitations in Generalized Wigner Crystals
Hongyuan Li, Ziyu Xiang, Emma Regan +9
Transition metal dichalcogenide-based moire superlattices exhibit very strong electron-electron correlations, thus giving rise to strongly correlated quantum phenomena such as gene…
Imaging Quantum Interference in Stadium-Shaped Monolayer and Bilayer Graphene Quantum Dots
Zhehao Ge, Dillon Wong, Juwon Lee +10
Experimental realization of graphene-based stadium-shaped quantum dots (QDs) have been few and incompatible with scanned probe microscopy. Yet, direct visualization of electronic s…