524 citations · 2.2k across the 83 of their papers we have counts for
25 papers · 1 filter
One-dimensional magnetic conduction channels across zigzag graphene nanoribbon/hexagonal boron nitride heterojunctions
Michele Pizzochero, Nikita V. Tepliakov, Johannes Lischner +2
We examine the electronic structure of recently fabricated in-plane heterojunctions of zigzag graphene nanoribbons embedded in hexagonal boron nitride. We focus on hitherto unexplo…
Valley-polarized Exitonic Mott Insulator in WS2/WSe2 Moiré Superlattice
Zhen Lian, Yuze Meng, Lei Ma +14
Strongly enhanced electron-electron interaction in semiconducting moiré superlattices formed by transition metal dichalcogenides (TMDCs) heterobilayers has led to a plethora of int…
Short vs. long range exchange interactions in twisted bilayer graphene
Alejandro Jimeno-Pozo, Zachary A. H. Goodwin, Pierre A. Pantaleón +6
We discuss the effect of long-range interactions within the self-consistent Hartree-Fock (HF) approximation in comparison to short-range atomic Hubbard interactions on the band str…
The interplay of field-tunable strongly correlated states in a multi-orbital moiré system
Aidan J. Campbell, Valerio Vitale, Mauro Brotons-Gisbert +5
The interplay of charge, spin, lattice, and orbital degrees of freedom leads to a wide range of emergent phenomena in strongly correlated systems. In heterobilayer transition metal…
Influence of atomic relaxations on the moiré flat band wavefunctions in antiparallel twisted bilayer WS
Laurent Molino, Leena Aggarwal, Indrajit Maity +3
Twisting bilayers of transition metal dichalcogenides (TMDs) gives rise to a periodic moiré potential resulting in flat electronic bands with localized wavefunctions and enhanced c…
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…
Unveiling and Manipulating Hidden Symmetries in Graphene Nanoribbons
Nikita V. Tepliakov, Johannes Lischner, Efthimios Kaxiras +2
Armchair graphene nanoribbons are a highly promising class of semiconductors for all-carbon nanocircuitry. Here, we present a new perspective on their electronic structure from sim…
Exciton-polarons in the presence of strongly correlated electronic states in a MoSe/WSe moiré superlattice
Aidan J. Campbell, Mauro Brotons-Gisbert, Hyeonjun Baek +5
Two-dimensional moiré materials provide a highly tunable platform to investigate strongly correlated electronic states. Such emergent many-body phenomena can be optically probed in…
Imaging reconfigurable molecular concentration on a graphene field-effect transistor
Franklin Liou, Hsin-Zon Tsai, Andrew S. Aikawa +9
The spatial arrangement of adsorbates deposited onto a clean surface in vacuum typically cannot be reversibly tuned. Here we use scanning tunneling microscopy to demonstrate that m…
Flat bands, electron interactions and magnetic order in magic-angle mono-trilayer graphene
Zachary A. H. Goodwin, Lennart Klebl, Valerio Vitale +6
Starting with twisted bilayer graphene, graphene-based moiré materials have recently been established as a new platform for studying strong electron correlations. In this paper, we…
Optical read-out of Coulomb staircases in a moiré superlattice via trapped interlayer trions
Hyeonjun Baek, Mauro Brotons-Gisbert, Aidan Campbell +5
Moiré patterns with a superlattice potential can be formed by vertically stacking two layered materials with a relative twist or lattice constant mismatch. The moiré superlattice c…
Hartree theory calculations of quasiparticle properties in twisted bilayer graphene
Zachary A. H. Goodwin, Valerio Vitale, Xia Liang +2
A detailed understanding of interacting electrons in twisted bilayer graphene (tBLG) near the magic angle is required to gain insights into the physical origin of the observed brok…
Resonant and Bound States of Charged Defects in Two-Dimensional Semiconductors
Martik Aghajanian, Bruno Schuler, Katherine A. Cochrane +6
A detailed understanding of charged defects in two-dimensional semiconductors is needed for the development of ultrathin electronic devices. Here, we study negatively charged accep…
Gate-Tunable Reversible Rashba-Edelstein Effect in a Few-Layer Graphene/2H-TaS2 Heterostructure at Room Temperature
Lijun Li, Jin Zhang, Gyuho Myeong +11
We report the observation of current-induced spin polarization, the Rashba-Edelstein effect (REE), and its Onsager reciprocal phenomenon, the spin galvanic effect (SGE), in a few-l…
Single plasmon hot carrier generation in metallic nanoparticles
Lara Román Castellanos, Ortwin Hess, Johannes Lischner
Hot carriers produced from the decay of localized surface plasmons in metallic nanoparticles are intensely studied because of their optoelectronic, photovoltaic and photocatalytic…
Microscopy of hydrogen and hydrogen-vacancy defect structures on graphene devices
Dillon Wong, Yang Wang, Wuwei Jin +8
We have used scanning tunneling microscopy (STM) to investigate two types of hydrogen defect structures on monolayer graphene supported by hexagonal boron nitride (h-BN) in a gated…
Optimizing hot electron harvesting at planar metal-semiconductor interfaces with titanium oxynitride thin films
Brock Doiron, Yi Li, Andrei Mihai +8
Understanding metal-semiconductor interfaces is critical to the advancement of photocatalysis and sub-bandgap solar energy harvesting where sub-bandgap photons can be excited and e…
Bound States of Charged Adatoms on MoS2: Screening and Multivalley Effects
Martik Aghajanian, Arash A. Mostofi, Johannes Lischner
Adsorbate engineering is a promising route for controlling the electronic properties of monolayer transition-metal dichalcogenide materials. Here, we study shallow bound states ind…
Impact of complex adatom-induced interactions on quantum spin Hall phases
Flaviano Jose dos Santos, Dario A. Bahamon, Roberto B. Muniz +4
Adsorbate engineering offers a seemingly simple approach to tailor spin-orbit interactions in atomically thin materials and thus to unlock the much sought-after topological insulat…
Spatially resolving density-dependent screening around a single charged atom in graphene
Dillon Wong, Fabiano Corsetti, Yang Wang +8
Electrons in two-dimensional graphene sheets behave as interacting chiral Dirac fermions and have unique screening properties due to their symmetry and reduced dimensionality. By u…
First-principles multiscale modelling of charged adsorbates on doped graphene
Fabiano Corsetti, Arash A. Mostofi, Johannes Lischner
Adsorbed atoms and molecules play an important role in controlling and tuning the functional properties of two-dimensional (2D) materials. Understanding and predicting this process…
Dispersion and lineshape of plasmon satellites in one, two and three dimensions
Derek Vigil-Fower, Steven G. Louie, Johannes Lischner
Using state-of-the-art many-body Green's function calculations based on the "GW plus cumulant" approach, we analyze the properties of plasmon satellites in the electron spectral fu…
Satellite structures in the spectral functions of semiconductor quantum well two-dimensional electron gases: a GW plus cumulant study
Johannes Lischner, Derek Vigil-Fowler, Steven G. Louie
We present theoretical calculations for the spectral functions and single-particle densities of states of the two-dimensional electron gas in semiconductor quantum wells at differe…
Physical origin of satellite in photoemission of doped graphene: An ab-initio GW plus cumulant study
Johannes Lischner, Derek Vigil-Fowler, Steven G. Louie
We calculate the photoemission spectra of suspended and epitaxial doped graphene using an ab initio cumulant expansion of the Green's function based on the GW self-energy. Our resu…