290 citations · 1.2k across the 28 of their papers we have counts for
28 papers
Robust Super-Moiré in Large Angle Single-Twist Bilayers
Yanxing Li, Chuqiao Shi, Fan Zhang +19
Forming long wavelength moiré superlattices (MSL) at small-angle twist van der Waals (vdW) bilayers has been a key approach to creating moiré flat bands. The small-angle twist, how…
Real-Space Imaging of the Band Topology of Transition Metal Dichalcogenides
Madisen Holbrook, Julian Ingham, Daniel Kaplan +11
The topological properties of Bloch bands are intimately tied to the structure of their electronic wavefunctions within the unit cell of a crystal. Here, we show that scanning tunn…
Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides
Yi-Hsun Chen, Ping-Yuan Lo, Kyle W. Boschen +15
In this work, we report a pronounced light upconversion in few-layer transition metal dichalcogenides. Our joint theory-experiment study attributes the upconversion photoluminescen…
Automated Grain Boundary Detection for Bright-Field Transmission Electron Microscopy Images via U-Net
Matthew J. Patrick, James K. Eckstein, Javier R. Lopez +6
Quantification of microstructures is crucial for understanding processing-structure and structure-property relationships in polycrystalline materials. Delineating grain boundaries…
Detecting Atomic Scale Surface Defects in STM of TMDs with Ensemble Deep Learning
Darian Smalley, Stephanie D. Lough, Luke Holtzman +6
Atomic-scale defect detection is shown in scanning tunneling microscopy images of single crystal WSe2 using an ensemble of U-Net-like convolutional neural networks. Standard deep l…
Highly tunable room-temperature plexcitons in monolayer WSe2 /gap-plasmon nanocavities
Thomas P. Darlington, Mahfujur Rahaman, Kevin W. C. Kwock +16
The advancement of quantum photonic technologies relies on the ability to precisely control the degrees of freedom of optically active states. Here, we realize real-time, room-temp…
Charge-transfer Contact to a High-Mobility Monolayer Semiconductor
Jordan Pack, Yinjie Guo, Ziyu Liu +10
Two-dimensional (2D) semiconductors, such as the transition metal dichalcogenides, have demonstrated tremendous promise for the development of highly tunable quantum devices. Reali…
Spontaneous Exciton Dissociation in Transition Metal Dichalcogenide Monolayers
Taketo Handa, Madisen A. Holbrook, Nicholas Olsen +8
Since the seminal work on MoS2 monolayers, photoexcitation in atomically-thin transition metal dichalcogenides (TMDCs) has been assumed to result in excitons with large binding ene…
Two-step flux synthesis of ultrapure transition metal dichalcogenides
Song Liu, Yang Liu, Luke Nemetz Holtzman +10
Here, we describe synthesis of TMD crystals using a two-step flux growth method that eliminates a major potential source of contamination. Detailed characterization of TMDs grown b…
Relative Grain Boundary Energies from Triple Junction Geometry: Limitations to Assuming the Herring Condition in Nanocrystalline Thin Films
Matthew J. Patrick, Gregory S. Rohrer, Ooraphan Chirayutthanasak +5
Grain boundary character distributions (GBCD) are routinely measured from bulk microcrystalline samples by electron backscatter diffraction (EBSD) and serial sectioning can be used…
P-type Ohmic contact to monolayer WSe2 field-effect transistors using high electron affinity amorphous MoO3
Yi-Hsun Chen, Kaijian Xing, Song Liu +10
1 School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia 2 Australian Research Council Centre of Excellence in Future Low-Energy Electronics Technolo…
Bilayer WSe as a natural platform for interlayer exciton condensates in the strong coupling limit
Qianhui Shi, En-Min Shih, Daniel Rhodes +8
Exciton condensates (EC) are macroscopic coherent states arising from condensation of electron-hole pairs. Bilayer heterostructures, consisting of two-dimensional electron and hole…
Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents
Ouri Karni, Elyse Barré, Vivek Pareek +21
Interlayer excitons (ILXs) - electron-hole pairs bound across two atomically thin layered semiconductors - have emerged as attractive platforms to study exciton condensation, singl…
Grain Growth and the Effect of Different Time Scales
Katayun Barmak, Anastasia Dunca, Yekaterina Epshteyn +2
Many technologically useful materials are polycrystals composed of a myriad of small monocrystalline grains separated by grain boundaries. Dynamics of grain boundaries play a cruci…
Tunable quantum confinement of neutral excitons using electric fields and exciton-charge interactions
Deepankur Thureja, Atac Imamoglu, Tomasz Smolenski +10
Quantum confinement is the discretization of energy when motion of particles is restricted to length scales smaller than their de Broglie wavelength. The experimental realization o…
Optical Measurement of Pseudo-Spin Texture of the Exciton Fine-Structure in Monolayer WSe2 within the Light Cone
Lorenz Maximilian Schneider, Shanece Esdaille, Daniel Rhodes +3
Several theoretical predictions have claimed that the neutral exciton of TMDCs splits into a transversal and longitudinal exciton branch, with the longitudinal one, which is the up…
Epitaxial metals for interconnects beyond Cu
Katayun Barmak, Sameer Ezzat, Ryan Gusle +13
The experimentally measured resistivity of Co(0001) and Ru(0001) single crystal thin films, grown on c-plane sapphire substrates, as a function of thickness is modeled using the se…
Diffusivity Reveals Three Distinct Phases of Interlayer Excitons in MoSe2/WSe2 Heterobilayers
Jue Wang, Qianhui Shi, En-Min Shih +8
Charge separated interlayer excitons in transition metal dichalcogenide (TMDC) heterobilayers are being explored for moiré exciton lattices and exciton condensates. The presence of…
Direct Measurement of the Radiative Pattern of Bright and Dark Excitons and Exciton Complexes in Encapsulated Tungsten Diselenide
Lorenz Maximilian Schneider, Shanece Esdaille, Daniel Rhodes +3
The optical properties of particularly the tungsten-based transition-metal dichalcogenides are strongly influenced by the presence of dark excitons. Recently, theoretical predictio…
WSe2/WS2 moiré superlattices: a new Hubbard model simulator
Yanhao Tang, Lizhong Li, Tingxin Li +8
The Hubbard model, first formulated by physicist John Hubbard in the 1960s, is a simple theoretical model of interacting quantum particles in a lattice. The model is thought to cap…
Enhanced Superconductivity in Monolayer -MoTe with Tilted Ising Spin Texture
Daniel Rhodes, Noah F. Yuan, Younghun Jung +13
Crystalline two-dimensional (2D) superconductors with low carrier density are an exciting new class of materials in which superconductivity coexists with strong interactions, the e…
Shedding light on the monolayer-WSe2 exciton's nature by optical effective-mass measurements
Lorenz Maximilian Schneider, Shanece Esdaille, Daniel Rhodes +3
Two-dimensional excitons formed in quantum materials such as monolayer transition-metal dichalcogenides and their strong light-matter interaction have attracted unrivalled attentio…
Statistics of grain growth: experiment versus the Phase-Field-Crystal and Mullins models
Gabriel Martine La Boissoniere, Rustum Choksi, Katayun Barmak +1
We present a detailed comparison of multiple statistical grain metrics for previously reported experimental thin film samples of aluminum with 2D simulations obtained from the Phas…
Scalable, "Dip-and-dry" Fabrication of a Wide-Angle Plasmonic Selective Absorber for High-efficiency Solar-Thermal Energy Conversion
Jyotirmoy Mandal, Derek Wang, Adam C. Overvig +7
A galvanic displacement reaction-based, room-temperature "dip-and-dry" technique is demonstrated for fabricating selectively solar-absorbing plasmonic nanostructure-coated foils (P…