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SUMMARY:Electrostatic effects in nanoscale ferroelectrics - Dr Chiara Gatt
 inoni\, Dept. of Physics\, Kings College London\, UK
DTSTART:20240222T150000Z
DTEND:20240222T160000Z
UID:TALK211096@talks.cam.ac.uk
CONTACT:Julie Smith
DESCRIPTION:The behavior of nanoscale forms of matter\, such as thin films
  or nanocrystal\, is strongly influenced by the structure and behavior of 
 their surfaces and interfaces. In nanoscale ferroelectrics\, a surface cha
 rge arises as a consequence of the ferroelectric polarization itself\, and
  this surface charge leads to an electrostatic instability – the so-call
 ed “polar catastrophe” – if it is not compensated. Here we show how 
 the properties of ferroelectric materials at the nanoscale are intimately 
 linked to the compensation mechanism that takes place at their surface. We
  also demonstrate how the structural and electronic properties of PbTiO3\,
  BiFeO3 and KTaO3 lead to a different compensation mechanism in each case\
 , and we discuss how to harness the properties of these nanoscale material
 s for applications in microelectronics and catalysis.\n\nDr Chiara Gattino
 ni is a Lecturer in Physics at King’s College London.\n\nShe uses atomis
 tic computational methods to study a wide range of surface science problem
 s\, from surfaces and interfaces of ferroelectric materials\, to catalysts
  for water splitting\, to nanoscale lubrication.\n\nChiara received her B.
 Sc. and PhD from the Department of Physics at King's College London. After
  a two-year hiatus from science to work in financial services\, Chiara sta
 rted building her multidisciplinary research expertise at Imperial College
  London (Engineering)\, University College London (Chemistry) and ETH Zuri
 ch (Materials Science). At ETH she held a Marie Skłodowska-Curie fellowsh
 ip between 2017-2020. She was appointed Lecturer in Chemical Engineering a
 t London South Bank University in 2021 before moving to KCL Physics in 202
 3.\n
LOCATION:Goldsmiths 2 &amp\; https://zoom.us/j/96836714124
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