We are happy to announce that our work have been recently published on Physical Review Letters. This article is entitled “Ferroelastic Twin Angles at the Surface of CaTiO3 Quantified by Photoemission Electron Microscopy”. This article deals with Gregoire Magagnin PhD’s work in the team.

DOI: https://doi.org/10.1103/PhysRevLett.132.056201

The new PEPR DIADEM website has just been released. In our team, this concerns Gunjan Yadav's postdoctoral work on the Microelec project: High throughput heterostructures elaboration and characterization for microelectronic applications.

Check out the different information here : https://www.pepr-diadem.fr/le-pepr-diadem/

Dr Adityanarayan Pandey has done graduation and post-graduation from Mumbai University in Physics. He completed PhD in Physics from RRCAT, Indore (University: Homi Bhabha National Institute, BARC, Mumbai) in 2018. For the doctoral thesis, he worked on electrical and magnetic properties of magnetic ion-doped relaxor ferroelectrics. Then, he joined IIT Bombay as postdoctoral fellow from 2019-2023 in Metallurgical Engineering and Materials Science and Electrical Engineering Department. He was working on piezoelectric and magnetoelectric 2-2 bilayer/trilayer thin films for actuator applications and HfO2 based nanoscale ferroelectrics and PCMO-based resistive memory for Neuromorphic applications

He has just joined LENSIS as a postdoctoral researcher to work on the project D3PO “Dopant and Defect Physics for Device Optimization for Hafnium Oxide based Devices”, a bilateral ANR-DFG project in collaboration with CEA/LETI (Grenoble) NaMLab (Dresden), Munich University Applied Sciences.

We are pleased to announce that Kimball Physics have finished the new electron gun which will be integrated into the HREELM prototype (https://anr.fr/Project-ANR-14-CE35-0019, we can also find details about the HREELM project in the Projects section). This tour de force of ultra-high vacuum, electron optics engineering should allow the production of highly monochromatic electrons for imaging surface vibrational states (collaboration with Daniel Comparat Laboratoire Aimé Cotton and Lionel Amiaud ISMO). The electron gun was realized thanks to a Labex NanoSaclay & PALM innovation project and internal funding from the CEA.

Two new positions have just been opened at LENSIS as part of the Ferro4edge project (1 postdoc and 1 PhD). Check out the "open positions" section, if you're interested !

On November 30th, the MicroElec project was launched in front of ANR members. The aim of this project is a high throughput heterostructures elaboration and characterization for microelectronic applications. In our laboratory, we will perform HAXPES & PEEM analysis of multiple FeCAPs with AI-assisted image processing using new operando sample holder & high intensity, focused X-ray source (MicroElec funded). Gunjan Yadav already worked on this topic since end of August as a postdoctoral.

Au LENSIS nous avons le plaisir d'accueillir Vineeta YADAV pour une thèse dans le cadre du PEPR électronique.

Vineeta Yadav has done her B. Sc. (Hons.) in Physics from University of Delhi and M. Sc. in Physics from Delhi Technological University, Delhi, India. She will be working in the LENSIS as PhD student on the topic “Hafnium Oxide Ferroelectric Films: from fundamental understanding to optimized low power device Integration”.

We are pleased to welcome to the LENSIS team Lucia Perez Ramirez as a permanent scientist:

Lucia Perez Ramirez earned her PhD in Physical Chemistry at LCPMR/Sorbonne University under the supervision of Jean-Jacques Gallet, where she studied the electronic structure of interfaces using several operando XPS techniques. She pursued her activity with a first postdoctoral experience at Synchrotron SOLEIL, where she worked on the development of advanced characterization techniques for the study of all-solid-state batteries. She was then appointed as scientific data engineer, in the context of the BIG-MAP European project, for the creation of data aggregation and semi-automatic analysis tools mainly for XAS and hyperspectral imaging experiments.

Nous avons le plaisir d’accueillir Gunjan Yadav en postdoc pendant deux ans sur le projet ciblé MicroElec du PEPR Diadem :

Gunjan Yadav did her PhD from University of Delhi, India. She joined as a postdoctoral researcher on the project titled  “High throughput heterostructures elaboration and characterization for microelectronic applications”

On May 25th, the BioElectronPhoton project was launched in front of ANR members, as part of the electronics PEPR. In our laboratory, this will result in a thesis. We will study hafnia based materials for hybrid materials systems OxRRAM/FeRAM. Vineeta Yadav will start her thesis on the subject in October.

New PhD student Tom IUNG

Tom IUNG commence sa thèse cifre au LENSIS, « Caractérisation du champ interne dans les matériaux ferroélectriques, application aux transistors de type FeFET», dans le cadre d’une collaboration avec Mickael Gros-Jean (ST Microelectronics, Crolles).

Dopant and Defect Physics for Device Optimization for Hafnium Oxide based Devices

The project is a Franco-German collaboration between the CEA, NaMLAb (Dresden) and the Technische Hochschule München, jointly funded by the ANR and the DFG.

Featured article from our LENSIS lab on Oxygen vacancy concentration as a function of cycling and polarization state in TiN/Hf0.5Zr0.5O2/TiN ferroelectric capacitors studied by x-ray photoemission electron microscopy

Link here : https://doi.org/10.1063/5.0093125

Kerisha Williams has returned to GeorgiaTech to continue her PhD work after spending 6 months with us doing XPS and SEM on her PMN-PT sol-gel films. Some high quality samples as can be seen from a typical Pb 4f spectrum shown here. Kerisha also did domain writing and characterization of HfZrO2 films and looked at the domain contrast in BaTiO3 single crystal surfaces using SEM.

We wish Kerisha the best of luck for final part of her thesis with Prof. Nazanin Bassiri Gharb and look forward, hopefully to some HAXPES beamtime in the near future.