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SUMMARY:Nanoscale competition between multiple phases in high-temperature 
 superconductors and ferroelectrics
DTSTART:20150206T141500
DTSTAMP:20260407T183656Z
UID:583bed988cbe61fdfb5448ebf5931bfab24637ef46297eaa64edcf8f
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Alessandro Ricci\, Deutsches Elektronen-Synchrotron DESY\,
  Hamburg\nBio: Alessandro entered to the Faculty of Dentistry\, University
  of Pisa (Italy)\, in 2002 and graduated with honours (magna cum laude) in
  2007.\nAfter a two-year clinical training in General Dentistry at the Car
 eggi University Hospital in Florence (Italy)\, he has exclusively worked i
 n the private dental sector. Alessandro’s special clinical interests are
  Implantology\, Prosthodontics\, Cosmetic Dentistry\, and he has also a co
 nsolidated experience in Invisible Orthodontics\, being an accredited All-
 in (Micerium) and Clear-Aligner (Scheu) provider.\nDuring the years\, his 
 continuing education program has involved several postgraduate diplomas. I
 n particular\, Alessandro has gained a MSc in Orthodontics (University of 
 L’Aquila\, Italy\, 2011)\, a Postgraduate certificate in Oral Surgery an
 d Pathology (University of Milan-Bicocca\, Italy\, 2012)\, a Diploma in Or
 al Surgery and Implantology (University of Innsbruck\, Austria)\, and he i
 s currently taking part in a two-year MSc in Implantology at the São Paul
 o University (Brazil).\nFunctional materials like high temperatureintrinsi
 c complexity. Indeed\, they show a coexistence of multiple phases like Cha
 rge-Density-Wave (CDW)\, Spin-Density-Wave (SDW) and the defects that get 
 organized in different nano-domains and exhibit a strong dynamic competiti
 on. The understanding of the interplay among these multiple phases is chal
 lenging because their complex spatial competition and dynamics are strongl
 y connected to the emerging of functional properties at the macroscopic sc
 ale. The interpretation at the nanoscale of these processes will open the 
 way to the development and optimization of new functional materials.\nIn o
 rder to clarify the phase’s coexistence it is important to understand th
 eir spatial-organization. On this purpose we developed innovative techniqu
 es like scanning micro X-ray diffraction (SµXRD) and resonant scanning mi
 cro X-ray diffraction (rSµXRD) to directly visualize the spatial-organiza
 tion of the SDW\, CDW and defects nano-domains. By the use of SµXRD on se
 veral High temperature superconductors (HTS) we evidenced a common nanosca
 le phase separation scenario\, characterized by the coexistence of competi
 ng scale-free networks of self-organized nano-domains [1-6]. Moreover\, we
  found that an optimum inhomogeneity is needed to promote the percolation 
 process and the emergence of properties like superconductivity at the macr
 oscopic scale [7]. In this process\, the way how the nano-domains interact
  and evolve in time is still a fundamental missing point. For this reason 
 a new experimental approach that combines temporal and spatial resolution 
 with bulk sensitivity has been developed [8]. Combining a time-resolved sc
 attering technique like X-ray Photon Correlation Spectroscopy (XPCS) with 
 resonant X-ray scattering (RIXS)\, we were able to find peculiar slow dyna
 mics in the nano-domains competition with high temperature superconductivi
 ty. Recently\, I extended these studies to the nano-structure and dynamics
  of magnetic and ferroelectric materials with the aim to nano-manipulate t
 hem and design new generation materials for electronics.\nReferences:\n1.
       Drees\, Y.*\, Z. W. Li*\, A. Ricci*\, et al.\, Nature Communica
 tions 5\, 5731+ (2014). (*these authors equally contribute)\n2.      
 A. Ricci\, et al.\, New Journal of Physics 16\, 053030+ (2014).\n3.   
    A. Ricci\, et al.\, Scientific Reports 3\, 2383+ (2013).\n4.    
   N. Poccia\, M. Fratini\, A. Ricci\, et al.\, Nature Materials\, 10\, 73
 3-736 ( 2011).\n5.      A. Ricci\, et al.\, Physical Review B 84\, 06
 0511+ (2011).\n6.      M. Fratini\, N. Poccia\, A. Ricci\, et al.\, N
 ature 466\, 841 (2010).\n7.      N. Poccia\, A. Ricci\, et al.\, Proc
 eedings of the National Academy of Sciences 109\, 15685 (2012).\n8.   
    A. Ricci\, Journal of Superconductivity and Novel Magnetism 1-4 (2014
 ).
LOCATION:PH L1 503 (Aquarium) http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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