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Physico chemistry of solids, thin films, biotechnologies
Applications for micro & nano- technologies, energy, health ...

> Research

Strongly Correlated Materials-v0

  • Study of oxide or nitride based materials with functional
    properties related to strong electronic interactions.
  • Synthesis of thin films, heterostructures, multilayers and supperlattices
  • Correlation of physical properties with microstructure, surface and interface properties, stress and strain.
Current breakthroughs in smart functional materials are based on correlations induced by strong electronic interactions leading to remarkable physical properties. New functionalities can be amplified and tuned by external parameters (stress, strain at interfaces or surfaces) particularly when these materials are prepared as multilayers or superlattices.

Nanodots in functional oxide multilayers

Systems under study

After several studies on oxide materials for electronic applications (high k, MIM), recent studies were devoted to perovskite ferroelectric and multiferroic oxides. Examples :
  • RE nickelates and the tuning of the metal-insulator transition by strain and stress (Thesis : C. Girardot & I. Iliescu).
  • The structural transformation from the monclinic mL-Ta2O5 in a trigonal phase (Na,K)2Ta4O11 resulting in “giant” piezoelectric coefficient d33 (>1000 pm/V). (Thesis: M. Le Gallic)
Another strength of the group is based on the development of superconducting heterostructures and multilayers : high Tc materials (YBCO/LZO/Ni) for current transport applications and low Tc materials multilayers (NbN/AlN/NbN) for RF cavity applications. The aim in both cases is to enhance physical properties either by optimizing the interfaces or by strengthening intrinsic physical properties in a multilayers configuration. (EUCARD2 Project).

  • M. Le Gallic (PhD student)
  • I. Illiescu (PhD student)
  • M. Benz (PhD student)
  • Dr. M. Burriel (Post-Doc)
  • SIMAP, Grenoble (France), E. Blanquet, A. Mantoux, F. Mercier
  • CEA/IRFU, Saclay (France), C. Antoine
  • IREC Barcelona (Spain), A. Tarancon
  • INAC, Grenoble (France), M. Hofheinz
  • CERN, Switzerland, S. Calatroni
  • Helmolz Zentrum Berlin (Germany), O. Kugeler

Main publications

I. Iliescu, M. Boudard, L. Rapenne, O. Chaix-Pluchery and H. Roussel
MOCVD selective growth of orthorhombic or hexagonal YMnO3 phase on Si(100) substrate, Applied Surface Science, 2014, 306, p 27-32

I. Iliescu, M. Boudard, S. Pignard, L. Rapenne, P. Chaudouet and H. Roussel
Growth and structural characterization of YMnO3 thin films grown by pulsed liquid injection MOCVD on Si and SrTiO3 substrates, Phase Transitions, 2013. 86(11): p. 1094-1103.

M. Le Gallic and H. Roussel
(Na(x)k(1-x))(2)Ta4O11 (x approximate to 0.93) piezoelectric phase from the transformation of Ta2O5 thin films of monoclinic structure, Journal of Solid State Chemistry, 2013. 200: p. 143-149.

M. Boudard, C. Girardot, N. Ihzaz, S. Pignard, L. Rapenne, H. Roussel and A. Bartasyte
X-ray and transmission electron microscopy structural characterization of multifunctional Perovskite thin films, Thin Solid Films, 2012. 520(14): p. 4608-4612.

C. Girardot, S. Pignard, F. Weiss and J. Kreisel
SmNiO3/NdNiO3 thin film multilayers
Applied Physics Letters, 2011. 98(24): p. 241903

Date of update December 8, 2014

Université Grenoble Alpes