24. 01. 2024, 13:00

Defects, multi-properties coupling and giant electro-mechanical response in complex materials

Video
Dragan Damjanovic
24. 01. 2024, 13:00

Defects, multi-properties coupling and giant electro-mechanical response in complex materials

Video
Prof. dr. Dragan Damjanovic
Institute of Materials, Ecole polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland
Dragan Damjanovic is an emeritus professor at EPFL in Lausanne, Switzerland. Until a year ago, he led the group for ferroelectrics and functional oxides at the Institute of Materials, EPFL, and taught courses on the structure and electrical properties of materials. He is the recipient of numerous awards, including the award for the best lecturer in the field of materials.

In materials with complex chemistry, even a small concentration of defects may lead to a heterogeneous mesostructure and properties that differ from what is expected based on the material’s nominal crystal structure. One intriguing outcome of this complexity is the emergence of properties forbidden by the material’s nominal, average symmetry. In this talk, I will discuss doped CeO2, along with a few other materials. Although compositionally simple, doped CeO2 exhibits a complex defect structure that can be manipulated by external electrical and mechanical fields, resulting in symmetry-forbidden electrical polarity and electro-chemo-thermo-mechanical coupling. I will relate these findings to recent reports on a giant electro-mechanical response. Finally, I will provide a general comment on the communication of unusual results in scientific publications.

Dragan Damjanovic
Prof. dr. Dragan Damjanovic
Institute of Materials, Ecole polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland
Dragan Damjanovic is an emeritus professor at EPFL in Lausanne, Switzerland. Until a year ago, he led the group for ferroelectrics and functional oxides at the Institute of Materials, EPFL, and taught courses on the structure and electrical properties of materials. He is the recipient of numerous awards, including the award for the best lecturer in the field of materials.

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Archive

 

2024
2023
2022
2021
2020
2019

2024

2023

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29. 11. 2023

Assoc. prof. dr. Lev Vidmar, Jožef Stefan Institute and Faculty of Mathematics and Physics, University of Ljubljana, Slovenia

Machine learning from relational and textual data

23. 03. 2023

prof. dr. Nada Lavrač, Jožef Stefan Institute, Ljubljana, Slovenia and prof. dr. Marko Robnik-Šikonja, Faculty of Computer Science and Informatics, University of Ljubljana, Slovenia

2022

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Enej Ilievski, Faculty of Mathematics and Physics, University of Ljubljana

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1. 12. 2022
Atish Dabholkar, International Centre for Theoretical Physics (ICTP), Trieste, Italy

In the depths of the atom
23. 11.2022
Alojz Kodre, Faculty of Mathematics and Physics, University of Ljubljana

Domain-wall dynamics in ferroelectric and relaxor-based ceramics
16. 11. 2022
Tadej Rojac, Jožef Stefan Institute

Usual and unusual states made of quarks
10. 11. 2022
Saša Prelovšek Komelj, Jožef Stefan Institute and Faculty of Mathematics and Physics, University of Ljubljana

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26. 10. 2022
Geoff Brennecka, Colorado School of Mines, USA

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Bogdan Parakhonskiy, Ghent University, Belgium

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Thomas Rockwell Mackie, University of Wisconsin, USA

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Borka Jerman Blažić, Jožef Stefan Institute

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Goran Dražić, National Institute of Chemistry and Jožef Stefan Institute

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21. 3. 2022
Luka Drinovec, University of Nova Gorica, Jožef Stefan Institute

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Griša Močnik, University of Nova Gorica, Jožef Stefan Institute

FAIR – the universe in the lab
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Paolo Giubellino in Joerg Blaurock, GSI and FAIR, Darmstadt, Germany

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Rok Žitko, Jožef Stefan Institute and Faculty of Mathematics and Physics, University of Ljubljana

2021

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15. 12. 2021
Matevž Dular, Faculty of Mechanical Engineering, University of Ljubljana

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Matej Praprotnik, National Institute of Chemistry and Faculty of Mathematics and Physics University of Ljubljana

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27. 10. 2021
Saša Svetina, Institute of biophysics, Faculty of Medicine, University of Ljubljana in Jožef Stefan Institute

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Matjaž Leskovar, Jožef Stefan Institute

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