Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Mark Rayson"'
Autor:
Chris Ewels, Jeremy Rio, Hiroyuki Niwa, Haruka Omachi, Hisanori Shinohara, Mark Rayson, Patrick Briddon
Publikováno v:
Royal Society Open Science, Vol 5, Iss 9 (2018)
Using density functional theory approaches, we follow the sequential addition of CF3 functional groups to the surface of the metallic endofullerene species Gd@C60. The presence of gadolinium in the interior of the cage strongly influences the additio
Externí odkaz:
https://doaj.org/article/d259be33c82c47c88447a4560f0fc9a8
Publikováno v:
Materials Science Forum. 963:204-207
Experimental data indicate that carbon vacancies incorporated in active regions of SiC devices are important electrical defects, responsible for device limiting effects such as carrier lifetime reduction. For field-effect transistors that include a 4
Publikováno v:
Diamond and Related Materials. 94:137-145
Control over the chemical termination of diamond surfaces has shown great promise in the realization of field-emission applications, the selection of charge states of near-surface color-centers such as NV, and the realization of surface-conductive ch
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 33(16)
The ability to accurately and consistently determine the surface electronic properties of polar materials is of great importance for device applications. Polar surface modelling is fundamentally limited by the spontaneous polarisation of these materi
Doubly charged silicon vacancy center, Si-N complexes, and photochromism in N and Si codoped diamond
Autor:
Patrick R. Briddon, P.L. Diggle, T. Ardon, X. X. Wu, C. P. Michaels, Matthew W. Dale, R. Gupta, Mark Rayson, Claire J. Meara, Jonathan P. Goss, I. Friel, Ben Green, Ben Breeze, Mark E. Newton, B. L. Cann, U.F.S. D'Haenens-Johansson
Publikováno v:
Physical Review B. 101
Diamond samples containing silicon and nitrogen are shown to be heavily photochromic, with the dominant visible changes due to simultaneous change in total ${\mathrm{SiV}}^{0/\ensuremath{-}}$ concentration. The photochromism treatment is not capable
Publikováno v:
Results in Physics, Vol 16, Iss, Pp 102860-(2020)
We present a first principles density functional theory study of microscopic properties of Hydrogen defect centres in diamond. Several configurations, involving interstitial hydrogen impurities, have been considered either forming with other defects,
Autor:
Patrick R. Briddon, J. P. Goss, Meaad Al-Hadidi, N. E. B. Cowern, Oras A. Al-Ani, Mark Rayson
Publikováno v:
Journal of Crystal Growth. 468:448-451
Density-functional theory has been used to study the segregation of iron at Σ 3-(110) and Σ 5-(001) twist grain boundaries. We find both grain boundaries bind interstitial iron by less than 0.4 eV, and modify the equilibrium spin state. Although in
Publikováno v:
Journal of Crystal Growth. 468:728-731
Oxide perovskites such as BaZrO 3 possess many significant properties which render them useful in many technological and scientific applications such as sensors, optoelectronics, laser frequency doubling and high capacity memory cells. Several method
Autor:
Mark Rayson, Chloe Peaker, M.K. Atumi, R. Jones, A. B. Horsfall, Patrick R. Briddon, J. P. Goss
Publikováno v:
Diamond and Related Materials. 70:118-123
Diamond is an attractive material due to its extreme physical properties, and has recently found a key role in the developing field of quantum bits based upon long spin coherence times at room temperature. In both natural and synthetic diamond, nitro
Publikováno v:
Physical Review B. 100
A quantum-chemical study of the positive charge-state of the nitrogen-vacancy center in diamond is presented. Charge control of this promising qubit candidate is a focus of diamond quantum technology research, as currently charge stability relating t