Concept
Polymorphism (materials science)
Related people (33)
Philippe Gillet
Philippe GILLET completed his undergraduate studies in Earth Science at Ecole normale supérieure de la rue dUlm (Paris). In 1983 he obtained a PhD in Geophysics at Université de Paris VII and joined Université de Rennes I as an assistant. Having obtained a State Doctorate in 1988, he became a Professor at this same university, which he left in 1992 to join Ecole normale supérieure de Lyon.
The first part of his research career was devoted to the formation of mountain ranges particularly of the Alps. In parallel, he developed experimental techniques (diamond anvil cells) to recreate the pressure and temperature prevailing deep inside planets in the lab. These experiments aim at understanding what materials make up the unreachable depths of planets in the solar system.
In 1997, Gillet started investigating extraterrestrial matter. He was involved in describing meteorites coming from Mars, the moon or planets which have disappeared today and explaining how these were expelled from their original plant by enormous shocks which propelled them to Earth. He also participated in the NASA Stardust program and contributed to identify comet grains collected from the tail of Comet Wild 2 and brought back to Earth. These grains represent the initial minerals in our solar system and were formed over 4.5 billion years ago. He has also worked on the following subjects:
Interactions between bacteria and minerals.
Solid to glass transition under pressure.
Experimental techniques: laser-heated diamond anvil cell, Raman spectroscopy, X-ray diffraction with synchrotron facilities, electron microscopy.
Philippe Gillet is also active in science and education management. He was the Director of the CNRS Institut National des Sciences de lUnivers (France), the President of the French synchrotron facility SOLEIL and of the French National Research Agency (2007), and the Director of Ecole normale supérieure de Lyon. Before joining EPFL he was the Chief of Staff of the French Minister of Higher Education and Research.
Selected publications:
Ferroir, T., L. Dubrovinsky, A. El Goresy, A. Simionovici, T. Nakamura, and P. Gillet (2010), Carbon polymorphism in shocked meteorites: Evidence for new natural ultrahard phases, Earth and Planetary Science Letters, 290(1-2), 150-154.
Barrat J.A., Bohn M., Gillet Ph., Yamaguchi A. (2009) Evidence for K-rich terranes on Vesta from impact spherules. Meteoritics & Planetary Science, 44, 359374.
Brownlee D, Tsou P, Aleon J, et al. (2006) Comet 81P/Wild 2 under a microscope. Science, 314, 1711-1716.
Beck P., Gillet Ph., El Goresy A., and Mostefaoui S. (2005) Timescales of shock processes in chondrites and Martian meteorites. Nature 435, 1071-1074.
Blase X., Gillet Ph., San Miguel A. and Mélinon P. (2004) Exceptional ideal strength of carbon clathrates. Phys. Rev. Lett. 92, 215505-215509.
Gillet Ph. (2002) Application of vibrational spectroscopy to geology. In Handbook of vibrational spectroscopy, Vol. 4 (ed. J. M. Chalmers and P. R. Griffiths), pp. 1-23. John Wiley & Sons.
Gillet Ph., Chen C., Dubrovinsky L., and El Goresy A. (2000) Natural NaAlSi3O8 -hollandite in the shocked Sixiangkou meteorite. Science 287, 1633-1636.
Gervais Chapuis
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Studies at the Swiss Federal Institute of Technology in Zurich (ETHZ), Switzerland. After graduating in crystallography in 1966, he prepared his PhD thesis in the same institution under the direction of Prof.. A. Niggli which he obtained in 1972. For three years he continued his research at the Lawrence Berkeley Laboratory in California in the laboratory of Prof. D. H. Templeton, a well-known specialist in the field of resonant scattering. Back in Switzerland, he joined the newly created Institute of Crystallography at the University of Lausanne under the direction of Prof.. D. Schwarzenbach. In 1991 he was appointed full professor and in 1999, director of the Institute of crystallography. In 2003, his unit was transferred to the Ecole Polytechnique Fédérale in Lausanne (EPFL) where he was appointed professor.
G. Chapuis has chaired numerous committees in national and international organisations in the field of crystallography. In particular, he chaired the committee of aperiodic structures of the International Union of Crystallography (IUCr). He is also a member of the Education Committee of that organization. He also chaired the Swiss Society of Crystallography.
G. Chapuis is co-editor of the Journal Acta Crystallographica and participates in many committees for various readings of academic journals devoted to crystallography and solid state physics.
His research areas cover more specifically the theoretical and experimental study of aperiodic structures, especially incommensurate structures by diffraction and molecular dynamics. He is the author of over two hundred scientific papers published in international peer-reviewed journals. Moreover G. Chapuis is dedicated to the development of interactive teaching in crystallography using new communication technologies available on the Internet.
Arnaud Magrez
Education
PhD., Materials Science, summa cum laude, Université de Nantes, 2002
M.S., Chemistry, Université des Sciences et Technologies de Lille, 1999
Academic positions
Head of the Crystal Growth Facility, EPFL, 2012-present
Research Associate, Laboratoire de Physique de la Matière Complexe, EPFL, 2003-2012
Research Fellow, Peter Grunberg Institute, FZ-Juelich, 2002-2003
Administrative positions at EPFL
Scientific staff member, EPFL Assembly, 2015-present
Scientific staff member, School Council SB, 2014-present
Member of the IPHYS office 2016-present
Member of the ICMP office 2012-2015
Member of the safety committee of ICMP 2010-2015
Alfredo Pasquarello
Alfredo Pasquarello studied physics at the
Scuola Normale Superiore
of Pisa and at the University of Pisa, obtaining their respective degrees in 1986. He obtained a doctoral degree at the EPFL in 1991 with a thesis on
Multiphoton Transitions in Solids
. Then, he moved to Bell Laboratories at Murray Hill (New Jersey), where he carried out postdoctoral research on the magnetic properties of carbon fullerenes. In 1993, he joined the Institute for Numerical Research in the Physics of Materials (IRRMA), where his activity involved first-principles simulation methods. In 1998, he was awarded the EPFL Latsis Prize for his research work on disordered silica materials. Succeeding in grant programs of the Swiss National Science Foundation, he then set up his own research group at IRRMA. In July 2003, he is appointed Professor in Theoretical Condensed Matter Physics at EPFL. Currently, he leads the Chair of Atomic Scale Simulation.
Dragan Damjanovic
Dragan Damjanovic received BSc diploma in Physics from the Faculty of Natural Sciences and Mathematics, University of Sarajevo, in 1980, and PhD in Ceramics Science from the Department of Materials Science and Engineering, College of Earth and Mineral Sciences, the Pennsylvania State University (PSU) in 1987. From 1988 to 1991 he was a research associate in the Materials Research Laboratory at the PSU. He joined the Ceramics Laboratory, Department of Materials Science and Engineering, Ecole polytechnique fédérale de Lausanne in 1991. He is currently a "professeur titulaire", heads the Group for Ferroelectrics and Functional Oxides at the Institute of Materials and teaches undergraduate and graduate courses on structure and electrical properties of materials. The research activities include fundamental and applied investigations of piezoelectric, ferroelectric and dielectric properties of a broad class of materials.