Materials Science Division
Bo Monemar, Department of Physics and Measurement Technology.

The research activities in the Materials Science Division cover a broad spectrum from basic research (which dominates) to projects of an applied character, partly in direct cooperation with industry. There is a strong international cooperation within most research projects. The present research program can be divided into the following partly overlapping areas: -preparation and characterization of epitaxial films and bulk material of semiconductors with chemical vapor deposition (CVD), liquid phase epitaxy (LPE) and sublimation techniques, with a strong emphasis on SiC and III-nitrides. The characterization includes surface and interface properties, structural properties, optical properties and transport properties. -studies of properties of dopants and defects in a large variety of semiconductors, including structural as well as electronic properties. The latter covers bulk, surface and interface defects, with several techniques including laser spectroscopy and magnetic resonance. -studies of the electronic properties of semiconductor quantum structures and nanostructures such as heterostructures, quantum wells, quantum wires and dots, and superlattices, with various spectroscopic techniques in several material systems. -studies of electronic structure, spin relaxation and spin transport properties in spintronic semiconductor materials and related device structures. -studies of the electronic structure of III-V-nitride materials, including defects and H-related properties. Research activities in this division during 2004 have produced about 50 papers published in high quality international journals, and a similar number of conference proceedings papers. More than 20 invited talks were given by the staff at international conferences or symposia. P.O. Holtz and Q.X. Zhao authored a book: "Impurities Confined in Quantum Structures", published by Springer Verlag, Springer Series in Materials Science, Vol. 77. The book "Physics and Applications of Dilute Nitrides", was edited by I. A. Buyanova and W. M. Chen (Taylor & Francis, New York, 2004). I A Buyanova also co-edited another book: Special Issues on "Dilute Nitrides and related mismatched semiconductor alloys" (IEE, Oxford, UK, 2004).