68 citations · 592 across the 32 of their papers we have counts for
32 papers
A depth resolved investigation of hydrogen uptake in carbon based nanostructures by soft-to-hard photoemission spectroscopy
Orlando Castellano, Alice Apponi, Luca Cecchini +11
Hydrogen chemisorption on graphitic carbon modifies the carbon orbital hybridization from sp2 to sp3, altering both structural and electronic properties. Understanding not only the…
Revealing the bonding nature and electronic structure of early transition metal dihydrides
Curran Kalha, Laura E. Ratcliff, Giorgio Colombi +11
Hydrogen as a fuel plays a crucial role in driving the transition to net zero greenhouse gas emissions. To realise its potential, obtaining a means of efficient storage is paramoun…
Stabilizing an atomically thin quantum spin Hall insulator at ambient conditions: Graphene-intercalation of indenene
Cedric Schmitt, Jonas Erhardt, Philipp Eck +11
Atomic monolayers on semiconductor surfaces represent a new class of functional quantum materials at the ultimate two-dimensional limit, ranging from superconductors [1, 2] to Mott…
Surface termination control of charge transfer and band alignment across a semiconductor-crystalline oxide heterojunction
M. Chrysler, J. Gabel, T. -L. Lee +5
Charge redistribution across heterojunctions has long been utilized to induce functional response in materials systems. Here we examine how the composition of the terminating surfa…
Capturing the dynamics of Ti diffusion across TiW/Cu heterostructures using X-ray photoelectron spectroscopy
Curran Kalha, Pardeep K. Thakur, Tien-Lin Lee +4
Interdiffusion phenomena between adjacent materials are highly prevalent in semiconductor device architectures and can present a major reliability challenge for the industry. To fu…
Boron nitride on SiC(0001)
You-Ron Lin, Markus Franke, Shayan Parhizkar +8
In the field of van der Waals heterostructures, the twist angle between stacked two-dimensional (2D) layers has been identified to be of utmost importance for the properties of the…
Thermodynamic Driving Forces for Substrate Atom Extraction by Adsorption of Strong Electron Acceptor Molecules
Paul Rhyan, Philip James Blowey, Billal S. Sohail +7
A quantitative structural investigation is reported, aimed at resolving the issue of whether substrate adatoms are incorporated into the monolayers formed by strong molecular elect…
Toward Functionalized Ultrathin Oxide Films: the Impact of Surface Apical Oxygen
Judith Gabel, Matthias Pickem, Philipp Scheiderer +12
Thin films of transition metal oxides open up a gateway to nanoscale electronic devices beyond silicon characterized by novel electronic functionalities. While such films are commo…
Evaluation of the Thermal Stability of TiW/Cu Heterojunctions Using a Combined SXPS and HAXPES Approach
Curran Kalha, Michael Reisinger, Pardeep. K. Thakur +7
Power semiconductor device architectures require the inclusion of a diffusion barrier to suppress, or at best prevent the interdiffusion between the copper metallisation interconne…
Site-specific surface atom valence band structure via X-ray standing wave excited photoemission
Yanna Chen, Leighton O. Jones, Tien-Lin Lee +5
X-ray standing wave (XSW) excited photoelectron emission was used to measure the site-specific valence band (VB) for 1/2 monolayer (ML) Pt grown on a SrTiO3 (001) surface. The XSW…
Vertical structure of Sb-intercalated quasifreestanding graphene on SiC(0001)
You-Ron Lin, Susanne Wolff, Philip Schädlich +7
Using the normal incidence x-ray standing wave technique as well as low energy electron microscopy we have investigated the structure of quasi-freestanding monolayer graphene (QFML…
Direct experimental evidence for substrate adatom incorporation into a molecular overlayer
Philip J. Mousley, Luke A. Rochford, Paul T. P. Ryan +11
While the phenomenon of metal substrate adatom incorporation into molecular overlayers is generally believed to occur in several systems, the experimental evidence for this relies…
Lifetime effects and satellites in the photoelectron spectrum of tungsten metal
Curran Kalha, Laura E. Ratcliff, Julio J. Gutiérrez Moreno +10
Tungsten is an important and versatile transition metal and has a firm place at the heart of many technologies. A popular experimental technique for the characterisation of tungste…
Design and realization of topological Dirac fermions on a triangular lattice
Maximilian Bauernfeind, Jonas Erhardt, Philipp Eck +8
Large-gap quantum spin Hall insulators are promising materials for room-temperature applications based on Dirac fermions. Key to engineer the topologically non-trivial band orderin…
The Vertical Position of Sr Dopants in the SrBiSe Superconductor
You-Ron Lin, Mahasweta Bagchi, Serguei Soubatch +6
The discovery of topological superconductivity in doped BiSe made this class of materials highly important for the field of condensed matter physics. However, the structura…
Controlling the electronic interface properties of AlO/SrTiO heterostructures
Berengar Leikert, Judith Gabel, Matthias Schmitt +6
Depositing disordered Al on top of SrTiO is a cheap and easy way to create a two-dimensional electron system in the SrTiO surface layers. To facilitate future device applic…
The Breakdown of Mott Physics at VO Surfaces
Matthew J. Wahila, Nicholas F. Quackenbush, Jerzy T. Sadowski +12
Transition metal oxides such as vanadium dioxide (VO), niobium dioxide (NbO), and titanium sesquioxide (TiO) are known to undergo a temperature-dependent metal-insu…
Electronic Structure and Small Hole Polarons in YTiO3
Jin Yue, Nicholas F. Quackenbush, Iflah Laraib +10
As a prototypical Mott insulator with ferromagnetic ordering, YTiO3 (YTO) is of great interest in the study of strong electron correlation effects and orbital ordering. Here we rep…
Influence of Polymorphism on the Electronic Structure of GaO
Jack E. N. Swallow, Christian Vorwerk, Piero Mazzolini +21
The search for new wide band gap materials is intensifying to satisfy the need for more advanced and energy efficient power electronic devices. GaO has emerged as an altern…
Effects of nitridation on SiC/SiO structures studied by hard X-ray photoelectron spectroscopy
Judith Berens, Sebastian Bichelmaier, Nathalie K. Fernando +11
SiC is set to enable a new era in power electronics impacting a wide range of energy technologies, from electric vehicles to renewable energy. Its physical characteristics outperfo…
Selective control of localised vs. delocalised carriers in anatase TiO2 through reaction with O2
Chiara Bigi, Zhenkun Tang, Gian Marco Pierantozzi +16
Two-dimensional (2D) metallic states induced by oxygen vacancies at oxide surfaces and interfaces provide new opportunities for the development of advanced applications, but the ab…
Separating Electrons and Donors in BaSnO3 via Band Engineering
Abhinav Prakash, Nicholas F. Quackenbush, Hwanhui Yun +9
Through a combination of thin film growth, hard X-ray photoelectron spectroscopy (HAXPES), scanning transmission electron microscopy/electron energy loss spectroscopy (STEM/EELS),…
Non-trivial topological valence bands of common diamond and zinc-blende semiconductors
Tomáš Rauch, Victor A. Rogalev, Maximilian Bauernfeind +11
The diamond and zinc-blende semiconductors are well-known and have been widely studied for decades. Yet, their electronic structure still surprises with unexpected topological prop…
Charge-transfer effect in hard x-ray 1 and 2 photoemission spectra: LDA+DMFT and cluster-model analysis
Mahnaz Ghiasi, Atsushi Hariki, Mathias Winder +6
We study and hard x-ray photoemission spectra (XPS) in a series of late transition metal oxides: FeO (3), FeTiO (3), CoO (3) and NiO (3$d…