Sylvain PETIT

Activity

Researcher in solid state physics, specialist in inelastic neutron scattering experiments
Deputy head of LLB

Research Topics

• Magnetism of insulators,
• Thin films, CMR manganites,
• Multiferroics,
• Spin-phonon coupling and Magneto-elastic coupling,
• Frustrated magnets,
• Low dimensional magnetism,
• Phase transitions,
• Liquid spin states,
• Quantum spin-ice

CV

Thesis supervision / co-supervision

• Antoine Vaunat (2021) : “Nouvelle frustration hybride dans les matériaux fortement corrélés : l’électromagnon”
• Mélanie Léger (2021) : “Fragmentation quantique dans les systèmes magnétiques frustrés”
• Tom Ferté (2017) : “Dynamique ultrarapide de l’aimantation dans les alliages de métaux de transitions et de terres rares”
• Solène Guitteny (2015) : “Etude de systèmes frustrés par diffusion neutronique : Pr₂Zr₂O₇ et Tb₂Ti₂O₇ sont-ils des glaces de spin quantiques ?“
• Monica Hatnean (2012) : “Synthèse et étude de composés Ga₂₋ₓFeₓO₃“
• Xavier Fabrèges (2010) : “Etude des propriétés magnétiques et du couplage spin/réseau dans les composés multiferroïques RMnO3 hexagonaux par diffusion de neutrons“

Scientific Publications

• ORCID id : 0000-0002-2169-0544
• Archive ouverte – HAL (> 2009):

Before 2009 :

“Thin films”:

• A room-temperature multiferroic with giant tetragonality
  H. Béa, B. Dupé, S. Fusil, R. Mattana, E. Jacquet, B. Warot-Fonrose, F. Wilhelm, A. Rogalev, S. Petit, V. Cros, A. Anane, F. Petroff, K. Bouzehouane, G. Geneste, B. Dkhil, S. Lisenkov, L. Bellaiche, M. Bibes and A. Barthélémy, Phys. Rev. Lett. 102, 217603 (2009)
• Structural distortion and magnetism of BiFeO₃ epitaxial thin films : a Raman spectroscopy and neutron diffraction study
  H. Béa, M. Bibes, S. Petit, J. Kreisel, A. Barthelemy, Philos. Mag. Lett., 87, 165 (2007)
• Mechanisms of exchange bias with multiferroic BiFeO₃ epitaxial thin films
  H. Béa, M. Bibes, F. Ott, B. Dupé, X.-H. Zhu, S. Petit S. Fusil, C. Deranlot, K. Bouzehouane, and A. Barthélémy, Phys. Rev. Lett. 100, 017204 (2008)
• Neutron diffraction study of hexagonal manganite YMnO₃, HoMnO₃ and ErMnO₃ epitaxial films
  I. Gélard, C. Dubourdieu, S. Pailhès, S. Petit, and Ch. Simon, App. Phys Lett. 92, 1 (2008)

“Manganites with giant magneto-resistance”:

• Spin waves and metallic state of magnetoresistive manganites
  S. Petit, M. Hennion, F. Moussa, D. Lamago, A. Ivanov and Y.Mukovskii, J. Phys. Conf. Ser. 200 (2010) 012159
• Quantized spin waves in the metallic state of magnetoresistive manganites
  S. Petit, M. Hennion, F. Moussa, D. Lamago, A. Ivanov, Y. M. Mukovskii4, D. Shulyatev, Phys. Rev. Lett. 102, 207201 (2009)
• Intralayer and interlayer exchange tuned by magnetic field in the bilayer manganite (La 0.4Pr0.6 )1.2Sr1.8Mn2O7 probed by inelastic neutron scattering
  F. Moussa, M. Hennion, A. Gukasov, S. Petit, L. P. Regnault, A. Ivanov, R. Suryanarayanan, M. Apostu, and A. Revcolevschi, Phys. Rev. B 78, 060406 (2008)
• Spin waves in ferromagnetic manganites
  F. Moussa, M. Hennion, P. Kober-Lehouelleur, D. Reznik, S. Petit, H. Moudden, A. Ivanov, Y. Mukovskii, R. Privezentsev, and F. Albenque-Rullier, Phys. Rev. B 76, 064403 (2007)

“Multiferroics”:

• Spin dynamics in the geometrically frustrated multiferroic CuCrO₂
  M. Poienar, F. Damay, C. Martin, J. Robert et S. Petit, Phys. Rev. B 81, 104411, (2010)
• Spin-lattice coupling, frustration, and magnetic order in multiferroic RMnO₃
  X. Fabrèges, S. Petit, I. Mirebeau, S. Pailhès, L. Pinsard, A. Forget, M. T. Fernandez-Diaz, and F. Porcher, Phys. Rev. Lett. 103 067204 (2009)
• Hybrid Goldstone modes in multiferroics
  S. Pailhès, X. Fabrèges1, L. P. Régnault, L. Pinsard-Godart, I. Mirebeau, F. Moussa, M. Hennion, and S. Petit, Phys. Rev. B 79, 134409 (2009)
• Magnetic order in YbMnO₃ studied by neutron diffraction and Mössbauer spectroscopy
  X. Fabrèges, I. Mirebeau, P. Bonville, S. Petit, G. Lebras-Jasmin, A. Forget, G. André, and S. Pailhès, Phys. Rev. B 78, 214422 (2008)
• Spin phonon coupling in hexagonal multiferroic YMnO₃
  S. Petit, F. Moussa, M. Hennion, S. Pailhès, L. Pinsard-Gaudart and A. Ivanov., Phys. Rev. Lett. 99, 266604 (2007)

“1-D systems”:

• Inelastic neutron scattering investigation of magnetic excitations in the spin-Peierls ground state of (TMTTF)₂PF₆
  Pascale Foury-Leylekian, Sylvain Petit, Claude Coulon, Bernard Hennion, Alec Moradpour, Jean-Paul Pouget, Physica B 404 (2009) 537–540
• Incommensurate spin correlation driven by frustration in BiCu₂PO₆
  O. Mentré, E. Janod, P. Rabu, M. Hennion, F. Leclercq-Hugeux, J. Kang,C. Lee, M.-H. Whangbo, and S. Petit, Phys. Rev. B, 80,180413R (2009)

“Supraconductivity” (PhD):

• Spin dynamic study of LaSrCuO₄ by inelastic neutron scattering
  S. Petit, H. Moudden, B Hennion, A. Vietkin and A Revcholevschi, Physica B, 234-236, 800-802, (1997)
• Neutron study of the spin dynamics in superconducting LaSrCuO₄
  S. Petit, H. Moudden, B Hennion, A. Vietkin and A. Revcholevschi, Physica C, 282, p.1375-1376, (1997)
• New slow and short range magnetic correlations in superconducting LaSrCuO₄
  S. Petit, H. Moudden, B Hennion, A. Vietkin and A. Revcholevschi, Eur. Phys. J. B, 3,163-167 (1997)
• Hole dynamics in doped cuprates : high Tc superconductivity originated from antiferromagnetics exchange as a direct attractive interaction
  F. Onufrieva, S. Petit, Y. Sidis, Phys. Rev. B 54 (12464), (1996)
• Hole doped cuprates : from small to large Fermi surface
  F. Onufrieva, S. Petit, Y. Sidis, Physica C, 226, 11, (1996)
• Key feature for high Tc superconductivity antiferromagnetic exchange as attractive interaction, combined with saddle point singularities close to Fermi level
  F. Onufrieva, S. Petit, Y. Sidis, J. Low. Temp. Phys, 105, 597, (1996)

Teaching activities

• Lectures on spin waves theory: JDN16, JDN18 and JDN22
• Summer schools of the Société française de la neutronique, MDANSE: “Molecular dynamics and lattice dynamics to analyse neutron scattering experiments”(Tenerife, Spain 2018),
• EPFL-ETHZ Summer School on quantum matter (Lausanne, Switzerland 2019),
• Neutron scattering techniques: European school of magnetism (Targoviste, Roumania 2011), Swedness summerschool (Tartu, Estonia 2017), University Paris 6 (2014-2018) and Bordeaux-I University (2008-2019).

Reviewing activities

• Since 2019: Member of the scientific advisory board of the LNCMI (Laboratoire National des Champs Magné-tiques Intenses),Grenoble, France
• Since 2019: Reviewer for Swiss national foundation (SNF), Switzerland
• Since 2015: Reviewer for the Agence Nationale de la Recherche Scientifique (ANR), France 2008-2013
• Reviewer for the ILL neutron facility, College 4,Grenoble,France
• Since 2008: Reviewer for the NIST neutron facility ,USA
• Since 2008: Reviewer for the LLB-Orphée french neutron facility (today 2FDN), Saclay, France
• Since 2008: Reviewer for PRL and Nature Physics.

Membership of Scientific Societies

• Since 2008 Member of the scientific society “Société Française de neutronique”
• Since 2011: Member of the CNRS Research Networks “GDR MICO” and “GDR MEETICC” (member of the scientific council).