B
B. Rafferty
Researcher at University of Cambridge
Publications - 5
Citations - 375
B. Rafferty is an academic researcher from University of Cambridge. The author has contributed to research in topics: Band gap & Amorphous carbon. The author has an hindex of 3, co-authored 3 publications receiving 366 citations.
Papers
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Journal ArticleDOI
Nitrogen modification of hydrogenated amorphous carbon films
S. R. P. Silva,John Robertson,Gehan A. J. Amaratunga,B. Rafferty,L. M. Brown,J. Schwan,D. F. Franceschini,Gino Mariotto +7 more
TL;DR: In this article, the effect of nitrogen addition on the structural and electronic properties of hydrogenated amorphous carbon (a-C:H) films has been characterized in terms of its composition, sp3 bonding fraction, infrared and Raman spectra, optical band gap, conductivity, and paramagnetic defect.
Journal ArticleDOI
Nitrogenated amorphous carbon as a semiconductor
TL;DR: The ability of nitrogen to improve the semiconducting properties of a-C:H is examined in this article, where a reduction in the activation energy for electronic conduction in nitrogenated amorphous carbon films and the approximately constant optical band gap with increasing N content suggest that N influences the bulk electronic properties of C:H:N.
Journal ArticleDOI
Calculation of the electronic structure of carbon films using electron energy loss spectroscopy.
Ioannis Alexandrou,Adam J. Papworth,B. Rafferty,Gehan A. J. Amaratunga,Christopher J. Kiely,L. M. Brown +5 more
TL;DR: The electronic properties of three widely studied carbon materials; namely amorphous carbon (a-C), tetrahedral amorphously carbon (ta-C) and C60 fullerite crystal are calculated and particular problems relating to the extraction of the single scattered data for these materials are addressed.
Book ChapterDOI
Numerical simulation of valence losses in MgO cubes
TL;DR: In this article , the authors used a distribution of surface and interface charges to analyze experimental STEM energy loss spectra for various incident beam positions near MgO cubes and identified the characteristic contributions of the cube edges.
Book ChapterDOI
EELS in the region of the fundamental bandgap.
B. Rafferty,L. M. Brown +1 more
TL;DR: The Bethe theory for inelastic scattering has been developed to understand the detailed shape of bandgap EELS spectra as mentioned in this paper , which shows how the matrix elements for direct and indirect transitions can be decoupled from one another and have energy dependencies of (E- Eg)1/2 and (E - Eg)3/2 respectively.