Presentation on theme: "Tribute to the career of Prof. Dr. Siegmar Kapphan"— Presentation transcript:
1Perovskite oxides and related materials: recent problems and perspectives Tribute to the career of Prof. Dr. Siegmar KapphanInternational workshopPavia, October 13th-14thDip. Fisica “A. Volta”Aula dottorato2nd floor
2http://ppp.unipv.it In 1799 Alessandro Volta invented the battery. He was then 54 years old and one of Europe’s most famous physicists.Since 1778 he had been Regius Professor of Experimental Physics at the Pavia University and been running the Physics Laboratory, which has been recently reconstructed.Not only is our Department named after him... but also the unit of measure of potential, which Volta called "tension", is named the "volt".
320 post graduate, PhD and fellowship students Dipartimento di Fisica “A. Volta” Head of Dept (2003-): Prof. C.B. AZZONI12 full professors14 associate professors7 researchers18 technicians20 post graduate, PhD and fellowship studentsBudget ~ 1.3 M€
41.3 M€ 0.6 M€ Sources of budget National Grants EU-Int Grants UNIPV Private CompaniesINFM
5Staff: M. Bornatici, O. Maj, N. Bertelli PHYSICS EDUCATION and PHYSICS HISTORY GroupStaff: G. Bonera, F. Bevilacqua, L. Borghi, A. De Ambrosis, L. Falomo, L. Mascheretti, M.C. Garbarino, L. Cardinali*Identification of tools and strategies to support the Physics teaching/learning process*Historical comprehension of the developments of different physical branchesQUANTUM INFORMATION THEORY GroupStaff: GM D’Ariano, C. Macchiavello, L. Maccone, M. Sacchi, P. Lo Presti, F. Buscemi, G. Chiribella, P. PerinottiQuantum Measuring Devices for Photonics and Quantum InformationEntanglement Assisted High Precision MeasurementsQuantum Teleportation and Quantum Cloning by the optical parametric squeezing processQuantum Properties of Distributed SystemsTHEORETICAL RESEARCH IN PLASMA PHYSICSStaff: M. Bornatici, O. Maj, N. Bertelli- propagation and absorption of electromagnetic waves in fusion plasmas.- wave propagation in inhomogeneous media: extension of the geometrical optics approximation.
6PHOTONICS MATERIALS AND NANOSTRUCTURES Staff: A. Stella, G. Guizzetti, F. Marabelli, L.C. Andreani, M. Patrini, M. Galli, M. Belotti, A. Balestreri, D. Gerace, M. LiscidiniPhotonic crystals and waveguidesMetallic and semiconductingnanoparticles in dielectric matricesSiGe Q-dots for integrated optics Si-compatibleQ-dots InAs/InGaAs for 1.3 – 1.55 micronIII-V structures for photovoltaic applicationsElectronic and photonic nanostructures: theory
8MAGNETISM AND SUPERCONDUCTIVITY Staff: A. Rigamonti, F. Borsa, P. Carretta, M. Corti, A. Lascialfari,p.i. S. AldrovandiPost-doc : J. LagoPhD students : E. Micotti, N. Papinutto, M. Filibian, M. MarianiTechniques :Nuclear Magnetic Resonance (NMR, mainly in Solids)Muon Spin Rotation (MUSR)Susceptibility and magnetization (SQUID)Specific heatMagnetic Resonance Imaging (collaborations)
9Motions and structure of flux lines lattice in superconductors Diamagnetic fluctuations above TC in BCS superconductors (MgB2)Quantum tunneling of the magnetization (QTM)Molecular nanomagnetsLow-dimensionalquantum antiferromagnets (S=1/2)
10OXIDES… Para/ferroelectrics High-k materials for sensors applications G. Samoggia; P. Galinetto; E. Giulotto; F. RossellaRAMAN SPECTROSCOPY, PHOTO and THERMO LUMINESCENCE, PHOTO and THERMO CONDUCTIVITYC.B. Azzoni; M.C. Mozzati; D. MaghiniEPR & MAGNETIZATIONE.R. MognaschiDIELECTRIC SPECTROSCOPY
11PEROVSKITE OXIDES Main Activities Phase transitions in mixed oxides based on ABO3 (KTO, STO, BTO, etc) compoundsStructural, electronic and optical properties of intrinsic and impurities defects in ABO3Study of the transport phenomena and charge localization due to optical irradiation in ABO3 compounds
12PHOTO-INDUCED EFFECTS ON PT IN KTO, STO Study of self-ordering and of new phase transitions in soft matrices containing interacting degrees of freedom of impurities and Jahn-Teller polaronsDoped KTO, KLT, KLTNPHOTO-INDUCED EFFECTS ON PT IN KTO, STONano-materials: effect of nanometric scaling on the occurrence and the nature of phase transition in BTO, KTO and STOPhoto-polarons in quantum paraelectric perovskite oxides: optical, charge transport, giant dielectric effects, structural transformations and other manifestations
13Market Applications of Switchable Materials, through 2006 ($ Millions) MARKET FOR SWITCHABLE MATERIALSBUSINESS COMMUNICATIONS COMPANY, INC., 25 Van Zant Street, Norwalk, CT 06855, Switchable materials are broken down into 3 classes of materials, ferroelectrics (FRAM), electrochromics, and materials used for optical switching(liquid crystals, polymers, and integrated chips)
15Laboratory of Nonlinear Optics and Ultrafast Spectroscopy Electronics Department - University of Pavia V. Degiorgio, I. Cristiani, D. Grando, P. Minzioni…Spectra Physics system composed by a pump laser Millennia, Ti:sapphire oscillators Tsunami emitting 70/130 fs and 1-15 ps nm,fs Optical Parametric Oscillator tunable from 1400 to 1800 nmRegenerative amplifier and OPASHG & THG,Hyper Rayleigh scatteingPump & probe techs
16Thursday, October 13th9:30 – 10:00 Workshop Opening – G. Samoggia/P. Galinetto10:00 – 10:15 Brief survey on the career of Prof. S. Kapphan – V.A. Trepakov10:15 – 11:10 Spectroscopy of defects in oxidic crystals – S. Kapphan11:10 – 11:30 Coffee break11:30 – 12:20 Low temperature structural phase transitions: pedagogical expositionA. Levanyuk12:30 – 14:00 Lunch14:00 – 15:00 Ferroelectric functional elements: device concepts, design of thin film properties, challenges in technology and physics – G. Suchanek15:00 – 15:45 Light-induced defects in SBN:Ce crystals – A. Gubaev15:45 – 16:00 Coffee break16:00 – 16:45 Hollow cathode plasma jet deposition technique: principles and application for BST thin films fabrication – Z. Hubicka16:45 – 17:05 Structural phase transition and photo-charge carrier transport in SrTiO3F. Rossella17:05 – 17:25 Femtosecond laser writing of surface microstructures in LiNbO3D. Grando17:25 – 17:50 Photorefractivity reduction in Hf-doped LiNbO3 – V. Degiorgio
17Friday 14th9:30 – 10:00 Role of defect chemistry on the properties of perovskite oxides: the case of manganites – L. Malavasi10:00 – 10:45 Photo-polarons in diluted KTa1-xNbxO3: UV light-induced IR absorption and photoconductivity manifestations – V. Trepakov10:45 – 11:00 Coffee break11:00 – 11:45 Spectroscopic ellipsometry: principles and applications to thin perovskite oxides ferroelectric films – A. Deyneka11:45 – 12:45 What does the theory really say about the critical thickness of ferroelectric films? – A. Levanyuk13:00 – 14:30 Lunch14:30 – 16:30 Visit to the laboratories