Details of Grant 

EPSRC Reference:	GR/M77826/01
Title:	TRANSITION METALS AND THEIR COMPLEXES IN DIAMOND
Principal Investigator:	Mainwood, Professor A
Other Investigators:	Collins, Professor AT Newton, Professor ME Davies, Professor G Lawson, Dr S
Researcher Co-Investigators:
Project Partners:	DTC Research Centre
Department:	Physics
Organisation:	Kings College London
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 1999	Ends:	30 September 2003	Value (£):	336,353
EPSRC Research Topic Classifications:	Materials Characterisation
EPSRC Industrial Sector Classifications:	Electronics No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
Transition metals, especially Ni, Fe and Co, are used as solvent-catalysts in the growth of synthetic diamond at high temperatures and high pressures. Understanding the behaviour of transition metals in diamond and in semiconductors in general remains challenging; the observed energy level structures are complicated by nearly degenerate atomic states with appreciable spin-orbit interactions, and transition metals interact readily both with other impurities and with themselves. This project will investigate the properties of transition metals and their complexes with other atoms in diamond, particularly with nitrogen, a very common impurity. Many transition-metal-related defects may be detected through their optical and paramagnetic signals, but to date there has been no systematic investigation of the defects, or how they modify the properties of the diamonds. Experimental studies of the defects will be made using paramagnetic resonance, photoluminescence cathodoluminescence, visible and infra-red absorption, in conjunction with applied strain fields; imaging using these experimental techniques will provide growth-sector data. Specially prepared samples, co-doped with nitrogen and boron, will be used for charge-state control. Radiation damage will be used to investigate migration rates. Theoretical modelling will be used to enhance the understanding of the separate microscopic structures, and to survey the transition metal series systematically.
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