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Frédéric Leroy

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Presentation

Introduction ------------ My research is focused on nanoscience and on the use of new in situ and real time experimental methods based on Low Energy Electron Microscopy and X-ray Scattering (synchrotron radiation). The goal is to study out-of-equilibrium surface phenomena at the nanometer scale. For the past 15 years, I have developed the use of in situ Grazing Incidence Small Angle X-ray Scattering to study in Fourier space in particular the self-organization of nanosize clusters and the growth of dendritic facetted structures formed during the dewetting of an unstable thin solid film. For the past 7 years, in situ Low Energy Electron Microscopy have been dedicated to surface modification studies on structural and morphological properties induced by a thermal, a chemical or an electrical stress. This research activity is mainly focused on out-of-equilibrium phenomena, e.g. the solid-solid-vapor triple line dynamics, and on the development of a setup based on holography with low energy electrons. Research carreer ---------------- **1-Mobility** After engineering studies in Physics (Grenoble Institute of Technology) then "Agrégation de Physique", I have done a **PhD at CEA-Grenoble** (2001-2004) under the supervision of Gilles Renaud and Jean-René Régnard. Title: *« Small Angle X-ray Scattering applied to the in situ growth of nanostructures: towards self-organized growth»*. 2004-2005 Post-doctoral position at the Max-Planck for Solid State physics (Stuttgart; resp. K. Kern) on *growth and characterization of two dimensionnal organometallic layers (Scanning Tunneling Microscopy)*. From 2005 to 2016 I was Associate Professor **(Habilitation, 2013)** at Aix-Marseille University. My research was done at the Interdisciplinary Center for Nanoscience of Marseille (CINaM, dir. Frédéric Fagès). **Since 2016 I am full professor**. My research is dedicated to studies on "structure and dynamics of surfaces". **2-Responsabilities** **2018-today** \- **Co-**Head of NanoMaterials Department of CINaM (30 permanent position).**** **2015-2017** \- **Head of NanoMaterials and Reactivity Department of CINaM (20 permanent position). \- Member of directory board of CINaM** (5 department heads and lab director). **2015-2019**: **National coordinator of ANR project HOLOLEEM**. Holographic Low Energy Electron Microscopy (220 k€). **2013-2017**: Member of ANR Project LOTUS. Triple line dynamics, solid-solid-vaccum (500 k€). Coordination of experiments on the triple line dynamics occuring with a chemical reaction. **2009-2015**: **Member of the scientific comittee (review panel) of synchrotron SOLEIL**. Electronic and magnetic properties / surfaces et interfaces. **March 2015**: Co-organisator of conference Surface Science Symp., Les Arcs, Fr. **2009-2011**: **National Coordinator of ANR P-NANO project DEFIS**. Solid state dewetting (800 k€). **2009-2011**: CNRS "delegation" Research project: Thin film dewetting (solid state) by Low Energy Electron Microscopy. **2008-2011**: Elected member of Material Science departement of Université Aix-Marseille 3, Marseille. **2009-2011**: Elected member of CINaM, UMR 7325. **2011**: Member of selection committee "Maître de Conférence" N◦0342 (Univ. Aix-Marseille 3). **2005-2008**: Member of ANR P-NANO project Nanomorphogénèse. **Juillet 2008**: Co-organisator of summer school NanoSteps, Centre CNRS, Cargese, Corse. **2008**: Member of selection committee "Maître de Conférence" N◦0568S publié en 28ème section, Univ. Aix-Marseille 2. **2008**: Member of selection committee " **3-Teaching responsabilities** **2016-today: Responsible for L2 Physics at AMU** **2017-today: Elected member of Physics Department (200 physicists) of UFR Sciences**

Publications

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Polar surface of ferroelectric nanodomains in GeTe thin films

B. Croes , F. Cheynis , P. Müller , S. Curiotto , F. Leroy et al.
Physical Review Materials, 2022, 6 (6), pp.064407. ⟨10.1103/PhysRevMaterials.6.064407⟩
Journal articles hal-03778329v1
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Reflections on the effect of an external flux in surface physics

Stefano Curiotto , F. Leroy , F. Cheynis , P. Müller
Surface Science, 2022, 725, pp.122158. ⟨10.1016/j.susc.2022.122158⟩
Journal articles hal-03778619v1
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Automatic Ferroelectric Domain Pattern Recognition Based on the Analysis of Localized Nonlinear Optical Responses Assisted by Machine Learning

Boris Croes , Iaroslav Gaponenko , Cédric Voulot , Olivier Grégut , Kokou D Dorkenoo et al.
Advanced Physics Research, 2022, pp.2200037. ⟨10.1002/apxr.202200037⟩
Journal articles hal-03899940v1
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Kinetic Monte Carlo simulations of the diffusion and shape evolution of single-layer clusters on a hexagonal lattice with and without external force

Stefano Curiotto , Pierre Müller , Fabien Cheynis , Frédéric Leroy
Applied Surface Science, 2021, 552, pp.149454. ⟨10.1016/j.apsusc.2021.149454⟩
Journal articles hal-03168149v1
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Mechanism of droplet motion and in-plane nanowire formation with and without electromigration

Stefano Curiotto , Pierre Müller , Fabien Cheynis , Frédéric Leroy
Applied Surface Science, 2021, 579, pp.152015. ⟨10.1016/j.apsusc.2021.152015⟩
Journal articles hal-03477645v1
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Kinetics and coupled dynamics of dewetting and chemical reaction in Si/SiO2/Si system

Frédéric Leroy , D Landru , Fabien Cheynis , O Kononchuk , Pierre Müller et al.
Journal of Materials Science, 2020, ⟨10.1007/s10853-020-05161-w⟩
Journal articles hal-03025140v1
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Dynamics of Au-Ge liquid droplets on Ge(1 1 1) terraces: Nucleation, growth and dynamic coalescence

Ali El-Barraj , Stefano Curiotto , Fabien Cheynis , Pierre Müller , Frédéric Leroy et al.
Applied Surface Science, 2020, 509, pp.144667. ⟨10.1016/j.apsusc.2019.144667⟩
Journal articles hal-02979162v1
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Dynamics of Gold Droplet Formation on SiO 2 /Si(111) Surface

Hadi Hijazi , Frédéric Leroy , Guillaume Monier , Gabin Grégoire , Evelyne Gil et al.
Journal of Physical Chemistry C, 2020, 124 (22), pp.11946-11951. ⟨10.1021/acs.jpcc.0c02378⟩
Journal articles hal-02992036v1
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2D Manipulation of Nanoobjects by Perpendicular Electric Fields: Implications for Nanofabrication

Stefano Curiotto , F. Cheynis , Pierre Müller , Frédéric Leroy
ACS Applied Nano Materials, 2020, 3 (2), pp.1118-1122. ⟨10.1021/acsanm.9b02517⟩
Journal articles hal-02499335v1
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Electric forces on a confined advacancy island

Frédéric Leroy , Ali El-Barraj , Fabien Cheynis , Pierre Müller , Stefano Curiotto et al.
Physical Review B, 2020, 102 (23), ⟨10.1103/PhysRevB.102.235412⟩
Journal articles hal-02569097v2
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Atomic Transport in Au-Ge Droplets: Brownian and Electromigration Dynamics

Frédéric Leroy , Ali El-Barraj , Pierre Müller , Fabien Cheynis , Stefano Curiotto et al.
Physical Review Letters, inPress
Journal articles hal-02319455v1
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2D nanostructure motion on anisotropic surfaces controlled by electromigration

Stefano Curiotto , Pierre Müller , Ali El-Barraj , Fabien Cheynis , Olivier Pierre-Louis et al.
Applied Surface Science, 2019, 469 (1), pp.463-470. ⟨10.1016/j.apsusc.2018.11.049⟩
Journal articles hal-01889868v2
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A framework based on sulcal constraints to align preterm, infant and adult human brain images acquired in vivo and post mortem

J. Lebenberg , M. Labit , G. Auzias , H. Mohlberg , C. Fischer et al.
Brain Structure and Function, 2018, 223 (9), pp.4153-4168. ⟨10.1007/s00429-018-1735-9⟩
Journal articles hal-02005978v1
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Interplay between deoxidation and dewetting for ultrathin SOI films

M. Trautmann , F. Cheynis , F. Leroy , S. Curiotto , Pierre Müller et al.
Applied Physics Letters, 2017, 110 (16), pp.161601. ⟨10.1063/1.4980132⟩
Journal articles hal-01617080v1
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Dewetting of patterned solid films: Towards a predictive modelling approach

M. Trautmann , F. Cheynis , F. Leroy , S. Curiotto , O. Pierre-Louis et al.
Applied Physics Letters, 2017, 110 (26), pp.263105. ⟨10.1063/1.4990005⟩
Journal articles hal-01617089v1

Elastic cost of silicon step rebonding

F. Leroy , Y. Garreau , F. Cheynis , B. Croset , A. Coati et al.
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93 (4), pp.045416. ⟨10.1103/PhysRevB.93.045416⟩
Journal articles hal-01438500v1

Surface diffusion of Au on root 3 x root 3 Si(111)-Au studied by nucleation-rate and Ostwald-ripening analysis

S. Curiotto , F. Cheynis , F. Leroy , Pierre Müller
Surface Science, 2016, 647, pp.8-11. ⟨10.1016/j.susc.2015.11.015⟩
Journal articles hal-01455008v1

Catalytically enhanced thermal decomposition of chemically grown silicon oxide layers on Si(001)

F. Leroy , T. Passanante , F. Cheynis , S. Curiotto , E. B. Bussmann et al.
Applied Physics Letters, 2016, 108 (11), pp.111601. ⟨10.1063/1.4941799⟩
Journal articles hal-01455015v1

How to control solid state dewetting: A short review

Frédéric Leroy , Lukasz Borowik , Fabien Cheynis , Yann Almadori , Stefano Curiotto et al.
Surface Science Reports, 2016, 71 (2), pp.391-409. ⟨10.1016/j.surfrep.2016.03.002⟩
Journal articles hal-01454999v1

In-plane Si nanowire growthmechanis in absence of external Si flux

S. Curiotto , F. Leroy , F. Cheynis , Pierre Müller
Nano Letters, 2015, 15 (7), pp.4788-4792
Journal articles hal-01176901v1
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Shape transition in nano-pits after solid-phase etching of SiO2 by Si islands

F. Leroy , Y. Saito , S. Curiotto , F. Cheynis , Olivier Pierre-Louis et al.
Applied Physics Letters, 2015, 106, pp.191601. ⟨10.1063/1.4921091⟩
Journal articles hal-01151207v1

Self propelled motion of Au-Si droplets on Si(111) mediated by monoatomic step dissolution

S. Curiotto , F. Leroy , F. Cheynis , Pierre Müller
Surface Science, 2015, 632, pp.1-8
Journal articles hal-01067979v1

Oxygen-induced inhibition of silicon-on-insulator dewetting

S. Curiotto , F. Leroy , F. Cheynis , Pierre Müller
Applied Physics Letters, 2014, 104, pp.061603
Journal articles hal-00975055v1
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Non equilibrium diffusion of reactive solid islands

F. Leroy , Y. Saito , F. Cheynis , E. Bussmann , O. Pierre-Louis et al.
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89, pp.235406. ⟨10.1103/PhysRevB.89.235406⟩
Journal articles hal-01021099v1

Combining Low-Energy Electron Microscopy and Scanning Probe Microscopy techniques for Surface Science : development of a novel sample-holder

F. Cheynis , F. Leroy , A. Ranguis , B. Detailleur , P. Bindzi et al.
Review of Scientific Instruments, 2014, 85, pp.043705
Journal articles hal-00992919v1

Simple views on surface stress and surface energy concepts

Pierre Müller , A. Saul , F. Leroy
Advances in Natural Sciences : Nanoscience and Nanotechnology, 2014, 5, pp.013002. ⟨10.1088/2043-6262/5/1/013002⟩
Journal articles hal-00919575v1
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Growth of Si ultrathin films on silver surfaces: Evidence of an Ag(110) reconstruction induced by Si

R. Bernard , T. Leoni , A. Wilson , T. Lelaidier , H. Sahaf et al.
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (12), pp.121411. ⟨10.1103/PhysRevB.88.121411⟩
Journal articles hal-00914746v1

Influence of facets on solid state dewetting mechanisms: Comparison between Ge and Si on SiO2

F. Leroy , F. Cheynis , T. Passanante , Pierre Müller
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (3), pp.035306
Journal articles hal-00914731v1

Agglomeration dynamics of germanium islands on a silicon oxide substrate: A grazing incidence small-angle x-ray scattering study

F. Cheynis , Frédéric Leroy , T. Passanante , Pierre Müller
Applied Physics Letters, 2013, 102, pp.161603
Journal articles hal-00843737v1

Dynamics and instability of solid-state dewetting

F. Cheynis , Frédéric Leroy , Pierre Müller
Comptes Rendus. Physique, 2013, 14, pp.578-589
Journal articles hal-00914737v1

Multiple scaled disorder in the photonic structure of Morpho rhetenor butterfly

J. Boulenguez , Serge Berthier , F. Leroy
Applied physics. A, Materials science & processing, 2012, 106 (4), pp.1005-1011. ⟨10.1007/s00339-011-6728-y⟩
Journal articles hal-01236766v1

Dynamics, anisotropy and stability of silicon-on-insulator dewetting fronts

Frédéric Leroy , F. Cheynis , T. Passanante , Pierre Müller
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 85, pp.195414
Journal articles hal-00698899v1

Stress effects on solid-state dewetting of nano-thin films

F. Cheynis , E. Bussmann , F. Leroy , T. Passanante , Pierre Müller et al.
International Journal of Nanotechnology, 2012, 9, pp.396-411
Journal articles hal-00696849v1

Regular arrays of palladium and palladium-gold clusters supported on alumina ultrathinfilms: stability under oxygen

G. Sitja , M. Marsault , F. Leroy , S. Le Moal , C.R. Henry et al.
International Journal of Nanotechnology, 2012, 9, pp.567-575
Journal articles hal-00992921v1

Dynamics of solid thin-film dewetting in the silicon-on-insulator system

E. Bussmann , F. Cheynis , F. Leroy , Pierre Müller , O. Pierre-Louis et al.
New Journal of Physics, 2011, 13, pp.043017. ⟨10.1088/1367-2630/13/4/043017⟩
Journal articles hal-00603256v1

Dewetting dynamics of silicon-on-insulator thin films

F. Cheynis , E. Bussmann , F. Leroy , T. Passanante , Pierre Müller et al.
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.245439
Journal articles hal-00696832v1
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Thermal instability of silicon-on-insulator thin films measured by low-energy electron microscopy

E. Bussmann , F. Cheynis , Frédéric Leroy , P. Muller
IOP Conference Series: Materials Science and Engineering, 2010, 12, pp.012016. ⟨10.1088/1757-899x/12/1/012016⟩
Journal articles hal-01967071v1

Rational Design of Two-Dimensional Nanoscale Networks by Electrostatic Interactions at Surfaces

S. Stepanow , R. Ohmann , F. Leroy , N. Lin , T. Strunskus et al.
ACS Nano, 2010, 4, pp.1813-1820. ⟨10.1021/nn100303z⟩
Journal articles hal-00523849v1

Step bunching to step-meandering transition induced by electromigration on Si(111) vicinal surface

Frédéric Leroy , D. Karashanova , M. Dufay , J.M. Debiere , T. Frisch et al.
Surface Science, 2009, 603, pp.507-512
Journal articles hal-00386919v1

Probing surfaces and interfaces morphology with Grazing Incidence Small Angle X-Ray Scattering

G. Renaud , Rémi Lazzari , F. Leroy
Surface Science Reports, 2009, 64 (8), pp.255-380
Journal articles hal-00440716v1

Is it possible to use external stress to tune silicon surface morphology ?

D. Karashanova , J.J. Métois , F. Leroy , Pierre Müller
Materials Science in Semiconductor Processing, 2009, 12, pp.12-15
Journal articles hal-00475815v1

Probing surface and interface morphology with Grazing Incidence Small Angle X-Ray Scattering

Gilles Renaud , Rémi Lazzari , Frédéric Leroy
Surface Science Reports, 2009, 64 (8), pp.255 - 380. ⟨10.1016/j.surfrep.2009.07.002⟩
Journal articles hal-01442842v1

Step bunching to step-meandering transition induced by electromigration on Si(111) vicinal surface

F. Leroy , D. Karashanova , M. Dufay , J.-M. Debierre , T. Frisch et al.
Surface Science, 2009, 603 (3), pp.507 - 512. ⟨10.1016/j.susc.2008.12.016⟩
Journal articles hal-01900752v1

Self-similarity during growth of the Au ∕ Ti O 2 ( 110 ) model catalyst as seen by the scattering of x-rays at grazing-angle incidence

Rémi Lazzari , Gilles Renaud , Jacques Jupille , Frédéric Leroy
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 76 (12), ⟨10.1103/PhysRevB.76.125412⟩
Journal articles hal-01442853v1

Growth of Co on Au(111) studied by multiwavelength anomalous grazing-incidence small-angle x-ray scattering: From ordered nanostructures to percolated thin films and nanopillars

Frédéric Leroy , Gilles Renaud , Antoine Létoublon , Rémi Lazzari
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 77 (23), pp.235429. ⟨10.1103/PhysRevB.77.235429⟩
Journal articles hal-01442851v1

External field as a tool for measuring absolute values of step-step interaction

Frédéric Leroy , Pierre Müller
Surface Science, 2008, 602, pp.126-132
Journal articles hal-00303807v1
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Vicinal silicon surfaces: From step density wave to faceting

F. Leroy , Pierre Müller , J. J Métois , O. Pierre-Louis
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 76 (4), pp.045402. ⟨10.1103/PhysRevB.76.045402⟩
Journal articles hal-01900746v1

Structural and morphological evolution of Co on faceted Pt/W(111) surface upon thermal annealing

C. Revenant , F. Leroy , G. Renaud , R. Lazzari , A. Létoublon et al.
Surface Science, 2007, 601 (16), pp.3431-3449. ⟨10.1016/j.susc.2007.06.026⟩
Journal articles hal-01442856v1

Vicinal silicon surfaces : from step density wave to faceting

F. Leroy , Pierre Müller , J.J. Metois , O. Pierre-Louis
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 76, pp.045402
Journal articles hal-00165327v1

X-ray scattering from stepped and kinked surfaces: An approach with the paracrystal model

Frédéric Leroy , Rémi Lazzari , Gilles Renaud
Surface Science, 2007, 601 (9), pp.1915 - 1929. ⟨10.1016/j.susc.2007.02.020⟩
Journal articles hal-01442857v1

Grazing-incidence small-angle x-ray scattering from dense packing of islands on surfaces: Development of distorted wave Born approximation and correlation between particle sizes and spacing

Rémi Lazzari , Frédéric Leroy , Gilles Renaud
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 76 (12), ⟨10.1103/PhysRevB.76.125411⟩
Journal articles hal-01442854v1

Self-Organized Growth of Nanoparticles on a Surface Patterned by a Buried Dislocation Network

F. Leroy , G. Renaud , A. Létoublon , R. Lazzari , C. Mottet et al.
Physical Review Letters, 2005, 95 (18), pp.185501. ⟨10.1103/PhysRevLett.95.185501⟩
Journal articles hal-01442861v1

In situ GISAXS study of the growth of Pd on MgO(001)

F. Leroy , C. Revenant , G. Renaud , R. Lazzari
Applied Surface Science, 2004, 238 (1-4), pp.233 - 237. ⟨10.1016/j.apsusc.2004.05.235⟩
Journal articles hal-01442911v1

Quantitative analysis of nanoripple and nanoparticle patterns by grazing incidence small-angle x-ray scattering 3D mapping

C. Revenant , F. Leroy , R. Lazzari , G. Renaud , C. Henry et al.
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2004, 85 (23), ⟨10.1103/PhysRevB.85.235415⟩
Journal articles hal-01442869v1

Effects of near-neighbor correlations on the diffuse scattering from a one-dimensional paracrystal

Frédéric Leroy , Rémi Lazzari , Gilles Renaud
Acta Crystallographica Section A : Foundations of Crystallography [1968-2013], 2004, 60 (6), pp.565 - 581. ⟨10.1107/S0108767304018550⟩
Journal articles hal-01442865v1

Quantitative analysis of grazing incidence small-angle x-ray scattering: Pd/MgO(001) growth

C. Revenant , F. Leroy , Rémi Lazzari , G. Renaud , C.R. Henry et al.
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2004, 69 (3), pp.035411. ⟨10.1103/PhysRevB.69.035411⟩
Journal articles hal-00004982v1

Effects of near-neighbor correlations on the diffuse scattering from a one-dimensional paracrystal

F. Leroy , Rémi Lazzari , G. Renaud
Acta Crystallographica Section A : Foundations and Advances [2014-..], 2004, 60 (6), pp.565
Journal articles hal-00004448v1

Real-Time Monitoring of Growing Nanoparticles

G. Renaud , Rémi Lazzari , Christine Revenant , Antoine Barbier , Marion Noblet et al.
Science, 2003, 300 (5624), pp.1416 - 1419. ⟨10.1126/science.1082146⟩
Journal articles hal-01442871v1

EMRS-Fall meeting 2022 symposium H on Innovative and Advanced Epitaxy: Introducing talk

Charles Cornet , Achim Trampert , Frédéric Leroy , Gavin Bell
European Materials Research Society - Fall Meeting 2022 (E-MRS 2022 Fall Meeting), European Materials Research Society, Sep 2022, Warsaw, Poland
Conference papers hal-03967876v1
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Dynamique hors-équilibre : Quelques exemples en physique des surfaces

Frédéric Leroy
Science des matériaux [cond-mat.mtrl-sci]. Aix-Marseille Université, 2013
Habilitation à diriger des recherches tel-00958344v1