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Guillaume F. Nataf


Parc de Grandmont 37200 TOURS


Thèmes de recherche

My research focuses on functional oxides (ferroelectrics and ferroelastics), whose outstanding properties result from a complex interaction between chemical compositions, crystallographic orientations and micro/nanostructures. I am particularly interested in micro/nanostructures (pores, domains, domain walls) and:

  • the evolution of their structural properties across phase transitions,
  • their response under constraint,
  • the characterisation and understanding of their own functionalities,
  • their role in thermal properties of materials.

Group members

Lucile Féger, PhD student (co-supervised with Isabelle Laffez)
Lucile Féger
Joachim Montoussé, PhD student (with the French company Soitec, co-supervised with Silvana Mercone, Kevin Nadaud, Micka Bah)
Joachim Montoussé
Vijaya Bhasker, PhD student (co-supervised with Fabien Giovannelli)
Vijaya Bhasker
Nassima Radouane, postdoc
Nassima Radouane

Previous group members

Rachid Belrhiti-Nejjar, master student (now PhD student at GREMAN)
Edgar Chaslin, master student (now PhD student at University of Rennes)
Mehdi El Kamily, master student

Activités / CV

Key Publications

  • P. Limelette, M. El Kamily, H. Aramberri, F. Giovannelli, M. Royo, R. Rurali, I. Monot-Laffez, J.Íñiguez, G. F. Nataf. Influence of ferroelastic domain walls on thermal conductivity. Phys. Rev. B 108, 144104 (2023) – doi: 10.1103/PhysRevB.108.144104
  • G. F. Nataf, M. Guennou, J. M. Gregg, D. Meier, J. Hlinka, E. K. H. Salje, J. Kreisel. Domain-wall engineering and topological defects in ferroelectric and ferroelastic materials. Nature Reviews Physics 2, 634-648 (2020) – doi: 10.1038/s42254-020-0235-z
  • G. F. Nataf, M. Guennou, J. Kreisel, P. Hicher, R. Haumont, O. Aktas, E. K. H. Salje, L. Tortech, C. Mathieu, D. Martinotti, N. Barrett. Control of surface potential at polar domain walls in a nonpolar oxide. Phys. Rev. Mater. 1, 74410 (2017) – doi: 10.1103/PhysRevMaterials.1.074410
  • G. F. Nataf, P. Grysan, M. Guennou, J. Kreisel, D. Martinotti, C. L. Rountree, C. Mathieu, N. Barrett. Low energy electron imaging of domains and domain walls in magnesium-doped lithium niobate. Sci. Rep. 6, 33098 (2016) – doi: 10.1038/srep33098
  • G. F. Nataf, P. O. Castillo-Villa, J. Baró, X. Illa, E. Vives, A. Planes, E. K. H. Salje. Avalanches in compressed porous SiO2-based materials. Phys. Rev. E 90, 022405 (2014) – doi: 10.1103/PhysRevE.90.022405
  • E. K. H. Salje, M. Carpenter, G. F. Nataf, G. Picht, K. Webber, J. Weerasinghe, S. Lisenkov, L. Bellaiche. Elastic excitations in BaTiO3 single crystals and ceramics: Mobile domain boundaries and polar nanoregions observed by RUS. Phys. Rev. B 87, 014106 (2013) – doi: 10.1103/PhysRevB.87.01410

Invited talks

  • Ferroelectric and ferroelastic domain walls: interfaces to tune thermal conductivity. Energy transfer at interfaces. Paris, France, 2023.
  • Domain-wall engineering in multiferroic materials. Annual meeting of the German Physical Society on Condensed Matter Physics. Regensburg, Germany, 2022.
  • Avalanches in ferroelectric and ferroelastic materials. Avalanche dynamics and precursors of catastrophic events. Debrecen, Hungary, 2022.
  • Multiferroic domain walls in ferroelastic materials. 9th International Advances in Applied Physics & Materials Science Congress & Exhibition. Ölüdeniz, Turkey, 2019.
  • Towards giant barocaloric materials with low hysteresis. EMN Meeting on Caloric Materials. Lyon, France, 2018.
  • High-pressure calorimetric methods for barocaloric materials. Short Summer School on TA&C. Chisinau, Moldavia, 2017

Research projects

  • ERC Starting Grant (2023-2027): Ferroic Materials for Dynamic Heat Flow Control