Guy Tréglia

Activity

Material Modelling

Themes

Theoretical Solid State Physics

Computational Material Science

Electronic structure and thermodynamical properties

Alloys, surfaces and interfaces, defects

Materials for Nuclear Energy

Recherche

Expertise and principal research interests

Previous research topics

• Electronic correlations (Hubbard model) : one and two particle excitation spctrum (photoemission, Auger).
• Theory close to synchrotron radiation : Surface Core Level Spetcroscopy and SEXAFS.
• Electronic Structure: Tight-Binding developments : continued fraction with band gaps, TBIM.
• Alloys : ordering processes from electronic structure.
• Surface physics : Reconstruction and phase transitions. Surface alloys and alloy surfaces. Surface segregation, kinetics and equilibrium properties.
• Clusters : Reconstruction and phase transitions.
• Epitaxial growth : diffusion (surface, interdiffusion), superstructures, interdiffusion, semiconductors. SiGe strain diffusion, silicides, disloctaions

Current reserach topics

• Material for Nuclear Energy : impact of rare gaz bubbles on the thermomecanial behaviour of UO2 fuel, fragilization of Zr by hyrdruration, ageing of FeNi steels in vessels, . 
• Quantification and propagation of uncertainties in Multi-scale methods : Baysian approach
• High Entropy Alloys : Defects

Methods

• Electronic structure calculations in condensed matter: Tight-Binding Methods (continued fractions, recursion) and Density Functional Theory
• Vibrational properties : thermal conductivity
• Semi-empirical interatomic potentials: Second Moment Approximation, Tight-Binding Ising Model.
• Classical molecular dynamics and Monte Carlo methods.
• Computational and numerical methods in general.

Parcours

Degrees

• PhD in Solid State Phyics from University Paris 11 Orsay(now Aix-Marseille Université). 17 June 1983.
• PhD in Solid State Phyics from University of Strasbourg. 8 Janvier 1979.
• DEA Physics and Chemistry of Materials from University of Nancy. 1976.
• Civil Mining Engineer from Mining School Nancy (ENSMIN) 1976.

Appointments

• Senior Research Associate (Directeur de Recherche 1, CRMCN/CINaM-CNRS). October 2005 to present.
• Senior Research Associate (Directeur de Recherche 2, CRMC2-CNRS). October 1992 to September 2005.
• Research Associate (Chargé de Recherche, LPS (Orsay)-CNRS). October 1981 to September 1992.
• Research Fellow ONERA Chatillon. October 1996 to September 1981.

Administrative Positions

• Head of GDR CNRS 3532 ModMat (Materials Modeling)) January 2012 to December 2020.
• President of the CINaM Scientific Comitee 2012-2017.
• Member of the Editorial Advisory Board of the Journal Surface Science (Elsevier)(
• Elected at SFP Condensed Matter Editorial Board of Journal Reflets de la Physique, 2005-2008.
• Member of Direction Comitee of CRMC2, CRMCN: Fusion Comitee of CRMC2-GPEC, axis co-responsable 2000-2004.
• Head of Research Master : Material Science and Nanoscience Aix-Marseille Universities, 1999-2008.
• Elected at CNRS National Comitee (Section 05) Member of the Board, 2000-2004.
• Creation of the Modelling Group at CRMC2 Head of the group , 1992-2004.

More

• Full list of publications according to Google Scholar can be found in the List of Publication