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Dr Leigh Stephenson

Position
Research Associate

Contact
Email:
Ph: + 61 2 9036 5124
Fax: + 61 2 9351 7682

Qualifications
BSc (Maths/Physics) (Hons), 2002, Macquarie University
PhD, 2009, University of Sydney


Background
In Leigh’s most recent past, he served as a PhD student under the supervision of Prof. Simon Ringer and Dr. Michael Moody upon a project that considered the cluster analysis of data obtained from atom-probe techniques. Part of Leigh’s work developed a parameter tuning process for such analyses through simulations and information theoretic concepts. Characterisation of a Al-Ag-Cu alloy was performed using such tuned atom-probe techniques, which complemented micrographs obtained using transmission electron microscopy.

Research project
Leigh is working with Prof. Simon Ringer in collaboration with researchers at the ARC Photovoltaics Centre of Excellence (APV CoE) at the University of New South Wales in a project that aims to cheaply and efficiently capture energy from sunlight. The research will advance understanding of the structure-activity relationships in silicon-based photovoltaics (PVs) by linking their properties and performance with targeted observations of their nanostructure with an end to precisely design nanostructured PVs with tailored properties. This work requires the use of atom-probe and electron tomography as well as state-of-the-art specimen preparation with focussed-ion beam techniques.

Other research interests

  • Quantum computing
  • Statistical physics
  • Pure mathematics
  • “Lasers”

Publications

  1. "Qualification of the tomographic reconstruction in atom probe by advanced spatial distribution map techniques", Moody, M.P. and Gault, B. and Stephenson, L.T. and Haley, D. and Ringer, S.P., Ultramicroscopy (2009) 109(7), pp 815-824
  2. Estimation of the reconstruction parameters for atom probe tomography (article), Gault, B. and de Geuser, F. and Stephenson, L.T. and Moody, M.P. and Muddle, B.C. and Ringer, S.P., Microscopy and Microanalysis (2008) 14(04), pp 296-305
  3. "Quantitative binomial distribution analyses of nanoscale like-solute atom clustering and segregation in atom probe tomography data", Moody, M.P. and Stephenson, L.T. and Ceguerra, A.V. and Ringer, S.P., Microscopy Research and Technique (2008) 71(7)
  4. "Analysis Techniques For Nanoscale Solute Clustering In Atom Probe Tomography", Ceguerra, A. and Moody, M. and Stephenson, L. and Ringer, SP, Microscopy and Microanalysis (2007) 13(S02), pp 1602-1603
  5. "Contingency table techniques for three dimensional atom probe tomography", Moody, M.P. and Stephenson, L.T. and Liddicoat, P.V. and Ringer, S.P., Microscopy Research and Technique (2007) 70(3)
  6. "New Techniques for the Analysis of Fine-Scaled Clustering Phenomena within Atom Probe Tomography (APT) Data", Stephenson, L.T. and Moody, M.P. and Liddicoat, P.V. and Ringer, S.P., Microscopy and Microanalysis (2007) 13(06), pp 448-463
  7. "Quantum walks in higher dimensions", Mackay, T.D. and Bartlett, S.D. and Stephenson, L.T. and Sanders, B.C., Journal of Physics A - Mathematical and General (2002) 35(12), pp 2745-2754

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