Joe Trodahl

Emeritus Professor - Physics School of Chemical and Physical Sciences

EProf Joe Trodahl profile picture

Medals and awards

Prince and Princess of Wales Award, 1984

NZ-Germany Science Cooperation Agreement Travel Award, 1987

Michaelis Memorial Prize, 1998

Fellow of the Royal Society of New Zealand, 1998


National Science Foundation (USA) Graduate Student Fellowship, 1963-68

Killam Postdoctoral Fellowship (UBC, Vancouver), 1968-71 Senior Scientist Fellowship, Norwegian Council for Science & Technology, 1990-91

Senior Scientist Fellowship, Canadian Science & Engineering Council, 1993-94

UK Engineering and Physical Science Res. Council, Senior Fellowship, 1998, 2003

Research interests

Preparation and study of amorphous GaN

This project has been granted NERF funding of about 1 $200k p.a. ($90k to VUW). It is being carried out in collaboration with A. Bittar at IRL, Roger Reeves and Steve Durbin at the U. of Canterbury, Andreas Markwitz at IGNS, Jim Metson at U. Auckland and several groups overseas. The material is of interest for its electro-optic and spintronic promise.

Vortices in superconductors

This is an ongoing project started in 1993. It has attracted support from the PGSF ($300 000, 1994-7), the Marsden Fund ($300 000, 1999-2002) and the US-NZ Cooperation Agreement ($5 000, 1998).

Properties of the cuprate superconductors

This VUW-IRL collaboration has been running continuously since the materials were discovered in 1987. The VUW research has been supported by the PGSF ($300k, 1994-7), the Marsden Fund ($70k, 1999-2002) and by the support of numerous students by IRL (PGSF funds). The VUW work has focussed on Raman spectroscopy and (in collaboration with Alan Kaiser) electron transport studies.

Properties of Strongly Correlated Transition Metal Oxides

This is a collaboration between IRL and VUW in which the IRL effort is supported by Marsden funds. That source pays two students and supports the direct costs of the research of one PhD student (approximately $400k, 1998-2006).

Optical and thermal properties of sea ice

This is a VUW programme within a large VUW, Otago U., Massey U., U. of Auckland, IRL collaboration studying a wide range of physical sea ice problems of relevance to climate and Southern Ocean biological communities. The VUW component has attracted PGSF support amounting to about $350k since 1996. We work in a close collaboration with scientists at the Geophysical Institute, University of Alaska, Fairbanks. Visit the Sea Ice Research at VUW for more information.

External Collaborations and External Research Funds:

External funds are listed above, and amount to about $270k p.a.

Active collaborations (those which will generate joint publications in the next year or two) are with scientists at the following institutions:

Mathematics, VUW : IRL : U. Canterbury : U Otago : U. Auckland : IGNS : University of Alaska: Montpellier University: U. Marseille: Institute for Optoelectronics, Bucharest: University of New South Wales: Imperial College, London : U. British Columbia, Vancouver : Max-Planck-Instiut für Festkörperforschung, Stuttgart

Selection of publications

Trodahl, H.J., Ruck, B.J., Lanke, U.D., Koo, A., Lee, H.K., Markwitx, A., Kennedy, V.J., Ariza, M.J., Jones, D.J., Roziere, J. and Bittar, A. "Compositional and structural studies of amorphous GaN grown by ion-assisted deposition" Mat. Res.Soc. Symp. Proc. 693 (2002) pp.347-351 Dr Ben Ruck (Author)

Trodahl, H.J., Ruck, B.J., Koo. A.A., Lanke, U.D., ruck, B.J., Brown, S.A., Reeves, R., Liem, I., and Bittar, A. "Conductivity, photoconductivity and opticla properties of amorphous GaN films" Mat. Res. Soc. Symp. Proc. 693 (2002) pp. 621-626 Dr Ben Ruck (Author)

Trodahl, H.J., Williams, G.V.M., Dupree, R., Howes, A., Kramer, S., Jung, C.U., Park, M-S, and Lee, S-I "Gap anisotropy, spin fluctuations, and normal-state properties of the electron-doped superconductor Sr0.9La0.1CuO2" Physical Review B 65 (2002) pp. 224520/1-224520/7

Trodahl, H.J., Kennedy, V.J., Markwitz, A., Lanke, U.D., McIvor, A. and Bittar, A. "Ion beam analysis of ion-assisted deposited amophous GaN" Nuclear Instruments and Methods in Physics Research B 190 (2002) pp. 620-724View Publications