Welcome to my University web page. I am a lecturer in the School of Electrical and Electronic Engineering, having arrived in Newcastle in November 2002. I am a member of the Materials Modelling Group within Emerging Technology and Materials, with a research portfolio based on the first-principles simulation of defects in semiconductors, crystal surfaces, nano-structures and dielectrics, necessitating the use of parallel computing, some facilities for which are based here in Newcastle University.
B.Sc. in Mathematics and Theoretical Physics, Exeter, 1992
Ph.D "A First Principles Study of Defects in Semiconductors", Exeter 1997.
1997-1999 Post-doctoral researcher, Physical Sciences, Dublin City University
1999-2002 Post-doctoral research, Dept Physics, Exeter University
Member of the Institute of Physics.
Stage 1 Tutor
EEE1001, EEE1AAA, PHY3009, PHY3010, CHY1401, CHY8430
My current research is primarily under a project entitled "Defect Engineering", which relates to the use of quantum-chemical methods to analyse dopants and other defects in crystalline materials to predict their optical, electronic and other properties.
Diamond, although strictly a very effective electrical insulator, may be modified to conduct electricity, with projected applications in fields from high-power switches to particle-detection. Pure diamond is optically transparent (in the visible part of the e-m spectrum) but defects in the crystal lattice can change the colour to bright yellows, red, pink, green and blue. Although these "fancy" diamonds occur naturally, they are very rare and hence expensive. However, defects giving rise to bright colour can be synthesized using hight-pressure and temperature techniques, sometimes involving irradiation. The quantum-chemical simulation of defects formed in the crystal lattice informs us as to the potential origins of colour and other properties such as thermal stability, allowing the gemologists to determine with some degree of precision which diamonds have been artificially enhanced, or treated to increase their value.
The application and analysis of density-functional based quantum-chemical simulation programs also involves problems in visualisation.
Although I principally study diamond-based electronics, I am simultaneously pursuing research in other materials: silicon, germanium, oxides (mainly ZnO), III-V compound semiconductors and nano-structures.
I have a developing research interest in silicon and carbon based quantum structures for optical device application, as well as the role of surface functionalisation in such materials. Future research will also involve my interest in the quantum behaviour of light atomic species in solid solution.
2002-2007 Principal investigator in "Defect Engineering" project funded by the EPSRC under the Advanced Research Fellow initiative.
I am currently co-supervising eight PhD students and have supervised five students to successfully defend their theses.
Invited talks at international conferences:
Invited departmental colloquia:
I completed an Engineering and Physical Sciences Research Council "Advanced Research Fellow" five year project in 2007.