264 citations · 1.1k across the 22 of their papers we have counts for
10 papers · 1 filter
Atomic step disorder on polycrystalline surfaces leads to spatially inhomogeneous work functions
Morgann Berg, Sean W. Smith, David A. Scrymgeour +11
Structural disorder causes materials surface electronic properties, e.g. work function () to vary spatially, yet it is challenging to prove exact causal relationships to underly…
Local Electronic Structure Changes in Polycrystalline CdTe with CdCl Treatment and Air Exposure
Morgann Berg, Jason M. Kephart, Amit Munshi +3
Post-deposition CdCl treatment of polycrystalline CdTe is known to increase photovoltaic efficiency. However, the precise chemical, structural, and electronic changes that unde…
Effects of CdCl treatment on the local electronic properties of polycrystalline CdTe measured with photoemission electron microscopy
Morgann Berg, Jason M. Kephart, Walajabad S. Sampath +2
To investigate the effects of CdCl treatment on the local electronic properties of polycrystalline CdTe films, we conducted a photoemission electron microscopy (PEEM) study of…
Molecular beam epitaxy growth of SrO buffer layers on graphite and graphene for the integration of complex oxides
Adam Ahmed, Hua Wen, Taisuke Ohta +4
We report the successful growth of high-quality SrO films on highly-ordered pyrolytic graphite (HOPG) and single-layer graphene by molecular beam epitaxy. The SrO layers have (001)…
Electronic Hybridization of Large-Area Stacked Graphene Films
Jeremy T. Robinson, Scott W. Schmucker, C. Bogdan Diaconescu +5
Direct, tunable coupling between individually assembled graphene layers is a next step towards designer two-dimensional (2D) crystal systems, with relevance for fundamental studies…
High resolution angle resolved photoemission studies on quasi-particle dynamics in graphite
C. S. Leem, B. J. Kim, Chul Kim +9
We obtained the spectral function of the graphite H point using high resolution angle resolved photoelectron spectroscopy (ARPES). The extracted width of the spectral function (inv…
Atmospheric pressure graphitization of SiC(0001)- A route towards wafer-size graphene layers
Konstantin V. Emtsev, Aaron Bostwick, Karsten Horn +11
We have investigated epitaxial graphene films grown on SiC(0001) by annealing in an atmosphere of Ar instead of vacuum. Using AFM and LEEM we observe a significantly improved surfa…
Van Hove Singularity and Apparent Anisotropy in the Electron-Phonon Interaction in Graphene
Cheol-Hwan Park, Feliciano Giustino, Jessica L. McChesney +5
We show that the electron-phonon coupling strength obtained from the slopes of the electronic energy vs. wavevector dispersion relations, as often done in analyzing angle-resolved…
Morphology of graphene thin film growth on SiC(0001)
Taisuke Ohta, Farid El Gabaly, Aaron Bostwick +6
Epitaxial films of graphene on SiC(0001) are interesting from a basic physics as well as applications-oriented point of view. Here we study the emerging morphology of in-vacuo prep…
Interlayer interaction and electronic screening in multilayer graphene
Taisuke Ohta, Aaron Bostwick, J. L. McChesney +3
The unusual transport properties of graphene are the direct consequence of a peculiar bandstructure near the Dirac point. We determine the shape of the pi bands and their character…