Presentazione di PowerPoint

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Perovskite oxides and related materials recent
problems and perspectives
Tribute to the career of Prof. Dr. Siegmar
Kapphan
International workshop Pavia, October
13th-14th Dip. Fisica A. Volta Aula
dottorato 2nd floor
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• In 1799 Alessandro Volta invented the battery.
• He was then 54 years old and one of Europes 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".

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Dipartimento di Fisica A. VoltaHead of Dept
(2003-) Prof. C.B. AZZONI
12 full professors 14 associate professors 7
researchers 18 technicians 20 post graduate, PhD
and fellowship students
Budget 1.3 M
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Sources of budget
1.3 M
National Grants
EU-Int Grants
UNIPV
Private Companies
INFM
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PHYSICS EDUCATION and PHYSICS HISTORY
Group Staff 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 branches

• QUANTUM INFORMATION THEORY Group
• Staff GM DAriano, C. Macchiavello, L. Maccone,
  M. Sacchi, P. Lo Presti, F. Buscemi, G.
  Chiribella, P. Perinotti
• Quantum Measuring Devices for Photonics and
  Quantum Information
• Entanglement Assisted High Precision Measurements
  
• Quantum Teleportation and Quantum Cloning by the
  optical parametric squeezing process
• Quantum Properties of Distributed Systems

THEORETICAL RESEARCH IN PLASMA PHYSICS Staff 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.
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PHOTONICS MATERIALS AND NANOSTRUCTURES Staff A.
Stella, G. Guizzetti, F. Marabelli, L.C.
Andreani, M. Patrini, M. Galli, M. Belotti, A.
Balestreri, D. Gerace, M. Liscidini

• Photonic crystals and waveguides
• Metallic and semiconducting
• nanoparticles in dielectric matrices
• SiGe Q-dots for integrated optics Si-compatible
• Q-dots InAs/InGaAs for laser _at_ 1.3 1.55 micron
• III-V structures for photovoltaic applications
• Electronic and photonic nanostructures theory

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Optical Techniques

• Linear
• angle-resolved reflectance transmittance
• spectroscopic ellipsometry
• modulation spectroscopies (photo-, electro- and
  thermo-reflectance).

• Nonlinear
• Raman scattering
• luminescence and
• second-harmonic generation
• time-resolved spectroscopy

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MAGNETISM AND SUPERCONDUCTIVITY
Staff A. Rigamonti, F. Borsa, P. Carretta, M.
Corti, A. Lascialfari, p.i. S.
Aldrovandi Post-doc J. Lago PhD students E.
Micotti, N. Papinutto, M. Filibian, M.
Mariani Techniques Nuclear Magnetic Resonance
(NMR, mainly in Solids) Muon Spin Rotation (MUSR)
Susceptibility and magnetization
(SQUID) Specific heat Magnetic Resonance Imaging
(collaborations)
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Motions and structure of flux lines lattice in
superconductors
Diamagnetic fluctuations above TC in BCS
superconductors (MgB2)
Quantum tunneling of the magnetization (QTM)
Molecular nanomagnets
Low-dimensional quantum antiferromagnets (S1/2)

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• OXIDES

• Para/ferroelectrics
• High-k materials
• for sensors applications

G. Samoggia P. Galinetto E. Giulotto F.
Rossella RAMAN SPECTROSCOPY, PHOTO and THERMO
LUMINESCENCE, PHOTO and THERMO CONDUCTIVITY C.B.
Azzoni M.C. Mozzati D. Maghini EPR
MAGNETIZATION E.R. Mognaschi DIELECTRIC
SPECTROSCOPY
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PEROVSKITE OXIDES Main Activities

• Phase transitions in mixed oxides based on ABO3
  (KTO, STO, BTO, etc) compounds
• Structural, electronic and optical properties of
  intrinsic and impurities defects in ABO3
• Study of the transport phenomena and charge
  localization due to optical irradiation in ABO3
  compounds

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Study of self-ordering and of new phase
transitions in soft matrices containing
interacting degrees of freedom of impurities and
Jahn-Teller polarons
Doped KTO, KLT, KLTN
PHOTO-INDUCED EFFECTS ON PT IN KTO,
STO Nano-materials effect of nanometric scaling
on the occurrence and the nature of phase
transition in BTO, KTO and STO
Photo-polarons in quantum paraelectric perovskite
oxides optical, charge transport, giant
dielectric effects, structural transformations
and other manifestations
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MARKET FOR SWITCHABLE MATERIALS
http//www.bccresearch.com/editors/RGB-267.html
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)
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Experimental facilities

• Raman and micro-Raman spectroscopy
• Optical absorption, PL, TL, PC, TSC
• Electron Paramagnetic Resonance
• Hall, Photo-Hall and magneto-optical spectroscopy
• Static magnetization measurements
• Dielectric characterization
• Ellipsometry
• Electro-optical characterization
• Femto-second laser sources

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Laboratory of Nonlinear Optics and Ultrafast
SpectroscopyElectronics Department - University
of PaviaV. Degiorgio, I. Cristiani, D. Grando,
P. Minzioni
Spectra Physics system composed by a pump laser
Millennia, Tisapphire oscillators Tsunami
emitting 70/130 fs and 1-15 ps pulses _at_ 780-820
nm, fs Optical Parametric Oscillator tunable
from 1400 to 1800 nm Regenerative amplifier and
OPA
SHG THG, Hyper Rayleigh scatteing Pump
probe techs
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Thursday, October 13th 930 1000 Workshop
Opening G. Samoggia/P. Galinetto 1000 1015
Brief survey on the career of Prof. S. Kapphan
V.A. Trepakov 1015 1110 Spectroscopy of
defects in oxidic crystals S. Kapphan 1110
1130 Coffee break   1130 1220 Low
temperature structural phase transitions
pedagogical exposition A. Levanyuk 1230
1400 Lunch 1400 1500 Ferroelectric
functional elements device concepts, design of
thin film properties, challenges in
technology and physics G. Suchanek 1500
1545 Light-induced defects in SBNCe crystals
A. Gubaev 1545 1600 Coffee break 1600
1645 Hollow cathode plasma jet deposition
technique principles and application for BST
thin films fabrication Z. Hubicka 1645
1705 Structural phase transition and
photo-charge carrier transport in SrTiO3 F.
Rossella 1705 1725 Femtosecond laser writing
of surface microstructures in LiNbO3 D.
Grando 1725 1750 Photorefractivity reduction
in Hf-doped LiNbO3 V. Degiorgio
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Friday 14th 930 1000 Role of defect
chemistry on the properties of perovskite oxides
the case of manganites L. Malavasi 1000
1045 Photo-polarons in diluted KTa1-xNbxO3 UV
light-induced IR absorption and
photoconductivity manifestations V.
Trepakov 1045 1100 Coffee break 1100
1145 Spectroscopic ellipsometry principles and
applications to thin perovskite oxides
ferroelectric films A. Deyneka 1145 1245
What does the theory really say about the
critical thickness of ferroelectric films?
A. Levanyuk 1300 1430 Lunch 1430
1630 Visit to the laboratories
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Prof. Paolo Camagni (1929 2000)