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Find an ExpertProfiling the University of Melbourne's Researchers

A/PROF LES J. ALLEN



Contact Details

Organization: Physics
Position: READER
Email:
Homepage: http://www.ph.unimelb.edu.au/tcmp/
Work: 8344 7402
Fax: 9347 4783

Research Expertise and International Linkages

Research Expertise

Research Interest Key Words Country of Expertise
Theoretical Condensed Matter Physics Atomic resolution imaging and spectroscopy, electron scattering, inner-shell ionization, phase imaging United States of America, United Kingdom, Japan, Germany, Belgium

International Linkages

Country Establishment Collaboration
United Kingdom University of Oxford Exchange, Research, Technical Assistance/Training
Ireland Trinity College Dublin Exchange, Research, Technical Assistance/Training
Taiwan National Tsing Hua University Exchange, Research, Technical Assistance/Training
United States Argonne National Laboratory Exchange, Research, Technical Assistance/Training
United States University of California - Santa Barbara Research
United Kingdom SuperSTEM Exchange, Research, Technical Assistance/Training
United States Ernest Orlando Lawrence Berkeley National Laboratory Exchange, Research, Technical Assistance/Training
United States Oak Ridge National Laboratory Exchange, Research, Technical Assistance/Training

Qualifications, Honours, Fellowships and Other Awards

Qualifications

Title Institution Date Awarded Abbreviation
Bachelor of Science Honours University of Port Elizabeth 31-Dec-1973
Master of Science University of Port Elizabeth 31-Dec-1974
Doctor of Philosophy University of South Africa 31-Dec-1980

Memberships

Membership Type Membership Body Description Start Date End Date
Council The University of Melbourne Council Academic Staff 21-Sep-2005 31-Dec-2007
Registered Australian Institute of Physics Full Member 01-Feb-1993

Other Awards

Award Type Awarding Body Comments Date Awarded
Medal Australian Microscopy and Microanalysis Society John Sanders Medal (for excellence in developing or applying electron microscopy techniques) 08-Feb-2006

Government Research Classifications

Research Fields, Courses and Discipline Classifications

Socio-Economic Objective Classifications

Grants and Contracts

Research Grants, Contracts and Consultancies awarded to the University of Melbourne as the administering institution (since 2003) as recorded in Themis Agreements.

Grants

Title Role Funding Source Scheme Award Date
The phase and inverse scattering problem for electrons multiply scattered by non-periodic solids Chief Investigator AUST RESEARCH COUNCIL Discovery Projects 09/10/2002
ATOMIC RESOLUTION IMAGING AND SPECTROSCOPY. Chief Investigator AUST RESEARCH COUNCIL Discovery Projects 01/01/2005
Imaging in three dimensions beyond the nanoscale Chief Investigator AUST RESEARCH COUNCIL Discovery Projects 01/01/2008

Publications

Publications produced at the University of Melbourne and reported in the Annual Publications Collection and 'Research Report' since 2001. The Themis Publications module, released in November 2006, allows additional publications from previous institutions and publications from past years to be entered.

Publications in 2009

Journal Articles

  • High-angle scattering of fast electrons from crystals containing heavy elements: Simulation and experiment
    Year: 2009
    Journal: Physical Review B
    Volume: 79
    Page numbers: 2141101-21411010
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  • Model of phonon excitation by fast electrons in a crystal with correlated atomic motion
    Year: 2009
    Journal: Physical Review B
    Volume: 80
    Page numbers: 0243081-02430814
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  • Quantitative comparisons of contrast in experimental and simulated bright-field scanning transmission electron microscopy images
    Year: 2009
    Journal: Physical Review B
    Volume: 80
    Page numbers: 1741061-1741065
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  • Theory of dynamical scattering in near-edge electron energy loss spectroscopy
    Year: 2009
    Journal: Physical Review B
    Volume: 80
    Page numbers: 1841081-18410815
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Publications in 2008

Journal Articles

  • Electron microscopy: New directions for chemical maps


    Year: 2008
    Journal: Nature Nanotechnology
    Volume: 3
    Page numbers: 255-256
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  • The phase and inversion problem for multiply scattered electrons


    Year: 2008
    Journal: Modern Physics Letters B
    Volume: 22
    Issue: 23
    Page numbers: 2123-2135
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  • Three-dimensional imaging in double aberration-corrected scanning confocal electron microscopy, Part I:  Elastic scattering


    Year: 2008
    Journal: Ultramicroscopy
    Volume: 108
    Page numbers: 1558-1566
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  • Atomic number contrast in high angle annular dark field imaging of crystals
    Year: 2008
    Journal: Materials Science and Technology: an international journal of technological advances in the production and use of steel
    Volume: 24
    Issue: 6
    Page numbers: 660-666
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  • Contrast Reversal in Atomic-Resolution Chemical Mapping
    Year: 2008
    Journal: Physical Review Letters
    Volume: 101
    Page numbers: 2361021-2361024
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  • Depth sectioning using electron energy loss spectroscopy
    Year: 2008
    Journal: Journal of Physics - Conference Series
    Volume: 126
    Page numbers: 0120371-0120374
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  • Direct retrieval of a complex wave from its diffraction pattern
    Year: 2008
    Journal: Optics Communications
    Volume: 281
    Page numbers: 5114-5121
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  • Modeling atomic-resolution scanning transmission electron microscopy images
    Year: 2008
    Journal: Microscopy and Microanalysis
    Volume: 14
    Page numbers: 48-59
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  • Multiple elastic scattering of core-loss electrons in atomic resolution imaging
    Year: 2008
    Journal: Physical Review B
    Volume: 77
    Page numbers: 1841071-1841078
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  • Quantitative Atomic Resolution Scanning Transmission Electron Microscopy
    Year: 2008
    Journal: Physical Review Letters
    Volume: 100
    Page numbers: 2061011-2061014
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  • Simulating Atomic Resolution STEM Images of Non-Periodic Samples
    Year: 2008
    Journal: Microscopy and Microanalysis
    Volume: 14
    Issue: supp 2
    Page numbers: 928-929
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  • Simulation of Atomic Resolution Images in STEM
    Year: 2008
    Journal: Microscopy and Microanalysis
    Volume: 14
    Issue: supp 2
    Page numbers: 922-923
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  • Three-dimensional imaging and analysis by optical sectioning in the aberration-corrected scanning transmission and scanning confocal electron microscopes
    Year: 2008
    Journal: Microscopy and Microanalysis
    Volume: 14
    Issue: supp 2
    Page numbers: 104-105
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  • Three-dimensional imaging in double aberration-corrected scanning confocal electron microscopy, Part II: Inelastic scattering
    Year: 2008
    Journal: Ultramicroscopy
    Volume: 108
    Page numbers: 1567-1578
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  • Three-dimensional imaging using aberration-corrected scanning transmission and confocal electron microscopy
    Year: 2008
    Journal: Journal of Physics - Conference Series
    Volume: 126
    Page numbers: 0120361-0120364
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  • Volcano structure in atomic resolution core-loss images
    Year: 2008
    Journal: Ultramicroscopy
    Volume: 108
    Page numbers: 677-687
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Conference Publications/Papers

  • Theoretical interpretation of electron energy-loss spectroscopic images
    Year: 2008
    Event name: EMMM-2007 International Conference
    Conference Publication: Proceedings of the EMMM-2007 International Conference
    Page numbers: 32-46
    Publisher: American Institute of Physics(New York)
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    Editor(s):

Publications in 2007

Journal Articles

  • Interpreting atomic-resolution spectroscopic images


    Year: 2007
    Journal: Physical Review B
    Volume: 76
    Page numbers: 0643031-0643038
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  • Depth sectioning in scanning transmission electron microscopy based on core-loss spectroscopy
    Year: 2007
    Journal: Ultramicroscopy
    Volume: 108
    Page numbers: 17-28
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  • Imaging using inelastically scattered electrons in CTEM and STEM geometry
    Year: 2007
    Journal: Ultramicroscopy
    Volume: 108
    Page numbers: 58-67
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  • Influence of orientation on the contrast of high-angle annular dark-field images of silicon
    Year: 2007
    Journal: Physical Review B
    Volume: 76
    Page numbers: 0141111-0141117
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  • Measuring the phase of a Bose-Einstein condensate
    Year: 2007
    Journal: Physical Review A
    Volume: 76
    Page numbers: 0536061-0536068
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  • Phase imaging from a diffraction pattern in the presence of vortices
    Year: 2007
    Journal: Optics Communications
    Volume: 277
    Page numbers: 288-294
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  • Two-dimensional mapping of chemical information at atomic resolution
    Year: 2007
    Journal: Physical Review Letters
    Volume: 99
    Page numbers: 0861021-0861024
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Publications in 2006

Journal Articles

  • The spatial resolution of core-loss imaging in the STEM


    Year: 2006
    Journal: Journal of Physics - Conference Series
    Volume: 26
    Page numbers: 13-16
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  • Channeling effects in high-angular-resolution electron spectroscopy
    Year: 2006
    Journal: Physical Review B
    Volume: 73
    Page numbers: 0941041-09410411
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  • Electron microscope Cs correction using iterative wave-function reconstruction
    Year: 2006
    Journal: Microscopy and Analysis
    Volume: 20
    Issue: 4
    Page numbers: 15-17
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  • Modelling high-resolution electron microscopy based on core-loss spectroscopy
    Year: 2006
    Journal: Ultramicroscopy
    Volume: 106
    Page numbers: 1001-1011
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  • Phase imaging and the evolution of a gold-vacuum interface at atomic resolution
    Year: 2006
    Journal: Physical Review B
    Volume: 74
    Page numbers: 1721021-1721024
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  • Spatial incoherence in phase retrieval based on focus variation
    Year: 2006
    Journal: Ultramicroscopy
    Volume: 106
    Page numbers: 914-924
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  • Three-dimensional ADF imaging of individual atoms by through-focal series scanning transmission electron microscopy
    Year: 2006
    Journal: Ultramicroscopy
    Volume: 106
    Page numbers: 1062-1068
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Publications in 2005

Journal Articles

  • Astigmatic electron diffraction imaging: a novel mode for structure determination
    Year: 2005
    Journal: Acta Crystallographica Section A
    Volume: 61
    Page numbers: 321-324
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  • Limitations to the measurement of oxygen concentrations by HRTEM imposed by surface roughness
    Year: 2005
    Journal: Microscopy and Microanalysis
    Volume: 11
    Issue: 2
    Page numbers: 111-115
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  • Modelling imaging based on core-loss spectroscopy in scanning transmission electron microscopy
    Year: 2005
    Journal: Ultramicroscopy
    Volume: 104
    Page numbers: 126-140
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  • Nonlocality in imaging
    Year: 2005
    Journal: Physical Review Letters
    Volume: 94
    Page numbers: 2039061-2039064
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  • Quantitative structure retrieval at atomic resolution
    Year: 2005
    Journal: Acta Crystallographica Section A
    Volume: 61
    Page numbers: 252-259
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  • The spatial resolution of imaging using core-less spectroscopy in the scanning transmission electron microscope
    Year: 2005
    Journal: Ultramicroscopy
    Volume: 102
    Page numbers: 317-326
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  • Three-dimensional imaging of individual hafnium atoms inside a semicondutor device
    Year: 2005
    Journal: Applied Physics Letters
    Volume: 87
    Page numbers: 0341041-0341043
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Computer Software Products

Audio Visual Recordings

    Publications in 2004

    Journal Articles

    • Exit wave reconstruction at atomic resolution
      Year: 2004
      Journal: Ultramicroscopy
      Volume: 100
      Page numbers: 91-104
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    • Exit wave reconstruction using soft X-rays
      Year: 2004
      Journal: Optics Communications
      Volume: 233
      Page numbers: 77-82
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    • Investigation of the effects of partial coherence on exit wave reconstruction
      Year: 2004
      Journal: Journal of Microscopy - Oxford
      Volume: 216
      Page numbers: 70-75
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    • Phase imaging with a half-plane aperture
      Year: 2004
      Journal: Journal of the Optical Society of America A -Optics Image Science and Vision
      Volume: 21
      Issue: 7
      Page numbers: 1172-1178
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    • Retrieval of a complex-valued object from its diffraction pattern
      Year: 2004
      Journal: Physical Review Letters
      Volume: 93
      Page numbers: 2339021-2339024
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    • Spectroscopic imaging of single atoms within a bulk solid
      Year: 2004
      Journal: Physical Review Letters
      Volume: 92
      Page numbers: 0955021-0955024
      Author(s):
      URL - open access http://au.arxiv.org/abs/cond-mat/0401156
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    Publications in 2003

    Journal Articles

    • ICSC: a program for calculating inelastic scattering cross sections for fast electrons incident on crystals
      Year: 2003
      Journal: Journal of Applied Crystallography
      Volume: 36
      Page numbers: 940-943
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    • Atomic-resolution electron energy loss spectroscopy imaging in aberration corrected scanning transmission electron microscopy
      Year: 2003
      Journal: Physical Review Letters
      Volume: 91
      Page numbers: 1055031-1055034
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    • Channelling effects in atomic resolution STEM
      Year: 2003
      Journal: Ultramicroscopy
      Volume: 96
      Page numbers: 299-312
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    • Computational aberration determination and correction
      Year: 2003
      Journal: Optics Communications
      Volume: 216
      Page numbers: 89-98
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    • Lattice-resolution contrast from a focused coherent electron probe. Part I
      Year: 2003
      Journal: Ultramicroscopy
      Volume: 96
      Page numbers: 47-63
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    • Lattice-resolution contrast from a focused coherent electron probe. Part II
      Year: 2003
      Journal: Ultramicroscopy
      Volume: 96
      Page numbers: 65-81
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    Publications in 2001

    Journal Articles

    • Atomic scattering factors for K-shell electron energy-loss spectroscopy
      Year: 2001
      Journal: Acta Crystallographica Section A
      Volume: 57
      Page numbers: 713-728
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    • Computational Aberration Correction for an Arbitrary Linear Imaging System
      Year: 2001
      Journal: Physical Review Letters
      Volume: 87
      Page numbers: 1239021-1239024
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    • Inversion of dynamical electron scattering to obtain the crystal potential using data from two thicknesses
      Year: 2001
      Journal: Acta Crystallographica Section A
      Volume: 57
      Issue: 4
      Page numbers: 473-474
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    • Phase retrieval and aberration correction in the presence of vortices in high-resolution transmission electron microscopy
      Year: 2001
      Journal: Ultramicroscopy
      Volume: 88
      Page numbers: 85-89
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    • Phase retrieval from images in the presence of first-order vortices
      Year: 2001
      Journal: Physical Review E
      Volume: 63
      Page numbers: 0376021-0376024
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    • Phase retrieval from series of images obtained by defocus variation
      Year: 2001
      Journal: Optics Communications
      Volume: 199
      Page numbers: 65-75
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    • Structure determination at the atomic level from dynamical electron diffraction data under systematic row conditions
      Year: 2001
      Journal: Ultramicroscopy
      Volume: 88
      Page numbers: 195-209
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