169 citations · 2k across the 46 of their papers we have counts for
47 papers
Direct measurement of 2DEG states in shallow Si:Sb -layers
Frode S. Strand, Simon P. Cooil, Quinn T. Campbell +13
We investigate the electronic structure of high-density layers of Sb dopants in a silicon host, so-called Si:Sb -layers. We show that, in spite of the known challenges in produc…
A Metastable Pentagonal 2D Material Synthesized by Symmetry-Driven Epitaxy
Lina Liu, Yujin Ji, Marco Bianchi +9
Most two-dimensional (2D) materials experimentally studied so far have hexagons as their building blocks. Only a few exceptions, such as PdSe2, are lower in energy in pentagonal ph…
Discovery of interlayer plasmon polaron in graphene/WS heterostructures
Søren Ulstrup, Yann in 't Veld, Jill A. Miwa +11
Harnessing electronic excitations involving coherent coupling to bosonic modes is essential for the design and control of emergent phenomena in quantum materials [1]. In situations…
Visualizing band structure hybridization and superlattice effects in twisted MoS/WS heterobilayers
Alfred J. H. Jones, Ryan Muzzio, Sahar Pakdel +16
A mismatch of atomic registries between single-layer transition metal dichalcogenides (TMDs) in a two dimensional van der Waals heterostructure produces a moiré superlattice with a…
Ultrafast electronic line width broadening in the C 1s core level of graphene
Davide Curcio, Sahar Pakdel, Klara Volckaert +31
Core level binding energies and absorption edges are at the heart of many experimental techniques concerned with element-specific structure, electronic structure, chemical reactivi…
Spectroscopic view of ultrafast charge carrier dynamics in single- and bilayer transition metal dichalcogenide semiconductors
P. Majchrzak, K. Volckaert, A. G. Cabo +24
The quasiparticle spectra of atomically thin semiconducting transition metal dichalcogenides (TMDCs) and their response to an ultrafast optical excitation critically depend on inte…
Hot carrier-assisted switching of the electron-phonon interaction in 1-VSe
Paulina Majchrzak, Sahar Pakdel, Deepnarayan Biswas +20
We apply an intense infrared laser pulse in order to perturb the electronic and vibrational states in the three-dimensional charge density wave material 1-VSe. Ultrafast sna…
Ultrafast triggering of insulator-metal transition in two-dimensional VSe
Deepnarayan Biswas, Alfred J. H. Jones, Paulina Majchrzak +24
Assembling transition metal dichalcogenides (TMDCs) at the two-dimensional (2D) limit is a promising approach for tailoring emerging states of matter such as superconductivity or c…
Moiré induced electronic structure modifications in monolayer VS on Au(111)
Umut Kamber, Sahar Pakdel, Raluca-Maria Stan +11
There is immense interest in how the local environment influences the electronic structure of materials at the single layer limit. We characterize moiré induced spatial variations…
Observation of Electrically Tunable van Hove Singularities in Twisted Bilayer Graphene from nanoARPES
Alfred J. H. Jones, Ryan Muzzio, Paulina Majchrzak +16
The possibility of triggering correlated phenomena by placing a singularity of the density of states near the Fermi energy remains an intriguing avenue towards engineering the prop…
Pnictogens Allotropy and Phase Transformation during van der Waals Growth
Matthieu Fortin-Deschênes, Hannes Zschiesche, Tevfik O. Menteş +13
Pnictogens have multiple allotropic forms resulting from their ns2 np3 valence electronic configuration, making them the only elemental materials to crystallize in layered van der…
Accessing the spectral function in a current-carrying device
Davide Curcio, Alfred J. H. Jones, Ryan Muzzio +12
The presence of an electrical transport current in a material is one of the simplest and most important realisations of non-equilibrium physics. The current density breaks the crys…
Momentum-resolved view of highly tunable many-body effects in a graphene/hBN field-effect device
Ryan Muzzio, Alfred J. H. Jones, Davide Curcio +12
Integrating the carrier tunability of a functional two-dimensional material electronic device with a direct probe of energy- and momentum-resolved electronic excitations is essenti…
Observation and origin of the -manifold in Si:P -layers
Ann Julie Holt, Sanjoy K. Mahatha, Raluca-Maria Stan +9
By creating a sharp and dense dopant profile of phosphorus atoms buried within a silicon host, a two-dimensional electron gas is formed within the dopant region. Quantum confinemen…
Layer and orbital interference effects in photoemission from transition metal dichalcogenides
Habib Rostami, Klara Volckaert, Nicola Lanata +10
In this work, we provide an effective model to evaluate the one-electron dipole matrix elements governing optical excitations and the photoemission process of single-layer (SL) and…
Momentum-resolved linear dichroism in bilayer MoS
Klara Volckaert, Habib Rostami, Deepnarayan Biswas +19
Inversion-symmetric crystals are optically isotropic and thus naively not expected to show dichroism effects in optical absorption and photoemission processes. Here, we find a stro…
Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser
Dmytro Kutnyakhov, Rui Patrick Xian, Maciej Dendzik +38
Time-resolved photoemission with ultrafast pump and probe pulses is an emerging technique with wide application potential. Real-time recording of non-equilibrium electronic process…
The Sub-band Structure of Atomically Sharp Dopant Profiles in Silicon
Federico Mazzola, Chin-Yi Chen, Rajib Rahman +7
The downscaling of silicon-based structures and proto-devices has now reached the single atom scale, representing an important milestone for the development of a silicon-based quan…
Direct observation of minibands in twisted heterobilayers
Søren Ulstrup, Roland J. Koch, Simranjeet Singh +8
Stacking two-dimensional (2D) van der Waals materials with different interlayer atomic registry in a heterobilayer causes the formation of a long-range periodic superlattice that m…
Nanoscale patterning of quasiparticle band alignment
Søren Ulstrup, Cristina E. Giusca, Jill A. Miwa +10
Control of atomic-scale interfaces between materials with distinct electronic structures is crucial for the design and fabrication of most electronic devices. In the case of two-di…
Transient Hot Electron Dynamics in Single-Layer TaS
Federico Andreatta, Habib Rostami, Antonija Grubišić Čabo +12
Using time- and angle-resolved photoemission spectroscopy, we study the response of metallic single layer TaS in the 1H structural modification to the generation of excited car…
Epitaxial single layer NbS on Au(111): synthesis, structure, and electronic properties
Raluca-Maria Stan, Sanjoy K. Mahatha, Marco Bianchi +4
We report on the epitaxial growth of single layer NbS on Au(111) and determine both its crystalline and electronic structure by a combination of low-energy electron diffraction…
Electron-phonon coupling in single-layer MoS2
Sanjoy K. Mahatha, Arlette S. Ngankeu, Nicki Frank Hinsche +15
The electron-phonon coupling strength in the spin-split valence band maximum of single-layer MoS is studied using angle-resolved photoemission spectroscopy and density function…
Quasi-free-standing single-layer WS2 achieved by intercalation
Sanjoy K. Mahatha, Maciej Dendzik, Charlotte E. Sanders +4
Large-area and high-quality single-layer transition metal dichalcogenides can be synthesized by epitaxial growth on single-crystal substrates. An important advantage of this approa…