46 citations · 307 across the 18 of their papers we have counts for
18 papers
Individual Vanadium Dopants Form Deep In-Gap States in Monolayer WS2
Tianhui Zhu, Carlos A. Gonzalez, Shihao Tu +11
Point defects in atomically thin materials have a strong impact on physical properties and those that induce in-gap states are advantageous for quantum information science and engi…
Visualizing the Impact of Quenched Disorder on 2D Electron Wigner Solids
Zhehao Ge, Conor Smith, Zehao He +17
Electron Wigner solids (WSs)1-12 provide an ideal system for understanding the competing effects of electron-electron and electron-disorder interactions, a central unsolved problem…
Direct Visualization of Relativistic Quantum Scars
Zhehao Ge, Anton M. Graf, Joonas Keski-Rahkonen +9
Quantum scars refer to eigenstates with enhanced probability density along unstable classical periodic orbits (POs). First predicted 40 years ago, scars are special eigenstates tha…
Imaging Tunable Luttinger Liquid Systems in van der Waals Heterostructures
Hongyuan Li, Ziyu Xiang, Tianle Wang +16
One-dimensional (1D) interacting electrons are often described as a Luttinger liquid1-4 having properties that are intrinsically different from Fermi liquids in higher dimensions5,…
Quantum Melting of a Disordered Wigner Solid
Ziyu Xiang, Hongyuan Li, Jianghan Xiao +15
The behavior of two-dimensional electron gas (2DEG) in extreme coupling limits are reasonably well-understood, but our understanding of intermediate region remains limited. Strongl…
Observation of Giant Orbital Magnetic Moments and Paramagnetic Shift in Artificial Relativistic Atoms and Molecules
Zhehao Ge, Sergey Slizovskiy, Peter Polizogopoulos +6
Massless Dirac fermions have been observed in various materials such as graphene and topological insulators in recent years, thus offering a solid-state platform to study relativis…
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…
Denoising Scanning Tunneling Microscopy Images of Graphene with Supervised Machine Learning
Frédéric Joucken, John L. Davenport, Zhehao Ge +6
Machine learning (ML) methods are extraordinarily successful at denoising photographic images. The application of such denoising methods to scientific images is, however, often com…
Ultra-sharp lateral junctions in modulation-doped graphene
Jesse Balgley, Jackson Butler, Sananda Biswas +9
We demonstrate ultra-sharp () lateral junctions in graphene using electronic transport, scanning tunneling microscopy, and first principles c…
Quasiparticle interference patterns in bilayer graphene with trigonal warping
Vardan Kaladzhyan, Frédéric Joucken, Zhehao Ge +5
We calculate the form of quasiparticle interference patterns in bilayer graphene within a low-energy description, taking into account perturbatively the trigonal warping terms. We…
Surface states and quasiparticle interference in Bernal and rhombohedral graphite with and without trigonal warping
Vardan Kaladzhyan, Sarah Pinon, Frédéric Joucken +6
We use an exact analytical technique [Phys. Rev. B \textbf{101}, 115405 (2020), Phys. Rev. B \textbf{102}, 165117 (2020)] to recover the surface Green's functions for Bernal (ABA)…
Sublattice dependence and gate-tunability of midgap and resonant states induced by native dopants in Bernal-stacked bilayer graphene
Frédéric Joucken, Cristina Bena, Zhehao Ge +5
The properties of semiconductors can be crucially impacted by midgap states induced by dopants, which can be native or intentionally incorporated in the crystal lattice. For Bernal…
Direct Visualization of Native Defects in Graphite and Their Effect on the Electronic Properties of Bernal-Stacked Bilayer Graphene
Frederic Joucken, Cristina Bena, Zhehao Ge +7
Graphite crystals used to prepare graphene-based heterostructures are generally assumed to be defect free. We report here scanning tunneling microscopy results that show graphite c…
Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene
Zhehao Ge, Sergey Slizovskiy, Fredric Joucken +5
Bloch states of electrons in honeycomb two-dimensional crystals with multi-valley band structure and broken inversion symmetry have orbital magnetic moments of a topological nature…
Visualization and Manipulation of Bilayer Graphene Quantum Dots with Broken Rotational Symmetry and Nontrivial Topology
Zhehao Ge, Frederic Joucken, Eberth Quezada +8
Electrostatically defined quantum dots (QDs) in Bernal stacked bilayer graphene (BLG) are a promising quantum information platform because of their long spin decoherence times, hig…
Determination of the trigonal warping orientation in Bernal-stacked bilayer graphene via scanning tunneling microscopy
Frédéric Joucken, Zhehao Ge, Eberth A. Quezada-López +4
The existence of strong trigonal warping around the K point for the low energy electronic states in multilayer (N2) graphene films and graphite is well established. It is res…
Probing the Electronic Structure of Graphene Near and Far from the Fermi Level via Planar Tunneling Spectroscopy
John L. Davenport, Zhehao Ge, Junyan Liu +12
Scanning tunneling spectroscopy (STS) has yielded significant insight on the electronic structure of graphene and other two-dimensional (2D) materials. STS directly measures a fund…
Visualizing the Effect of an Electrostatic Gate with Angle-Resolved Photoemission Spectroscopy
Frédéric Joucken, Jose Avila, Zhehao Ge +9
Electrostatic gating is pervasive in materials science, yet its effects on the electronic band structure of materials has never been revealed directly by angle-resolved photoemissi…