Santiago defended his PhD and answered brillantly the jury members questions (from left to right : Jérôme Wolfman, Eugénie Martinez, Maria Christine Richter, Mathieu Frégneaux, Nick Barrett and Bruno Domenichini)

Once again, congratulations !

“During my poster presentation on "Polarization Dependent Oxygen Vacancy Distribution in Ferroelectric Hf₀.₅Zr₀.₅O₂ Capacitors," I engaged in meaningful discussions with notable experts in the field, including Prof. Hwang, Prof. Jeon and Dr. Mueller. Key questions arose during these interactions: Prof. Datta inquired about the mechanisms behind oxygen vacancy migration under varying polarization conditions, which led me to explain the influence of built-in electric fields.  I gained valuable insights into several fundamental physics concepts. I learned about the dynamics of oxygen vacancies, revealing how their migration affects device reliability and functionality. I explored energy barriers associated with vacancy movement and the significant role of built-in electric fields in shaping vacancy distribution. This understanding highlighted the challenges related to wake-up and fatigue effects in ferroelectric devices. Additionally, discussions on optimizing HZO materials reinforced the importance of precise fabrication techniques and their implications for next-generation memory technologies.” (Dr. Gunjan Yadav)

We want to acknowledge the PEPR Diadem MicroElec project for the funding.

Successful HAXPES beamtime for Gunjan Yadav’s project on the BL09XU beamline of the Spring-8 synchrotron in Japan. Many thanks to Akira Yasui, Seo Okkyun, Jiagi Tang and Ibrahima Gueye for their help and support! Hopefully we have some nice results on the oxygen vacancy depth profiles in 6 nm HZO capacitors made in CEA/LETI and cycled at different voltages.

Work supported by the MicroElec project of the PEPR Diadem and by the Horizon Europe Ferro4EdgeAI.

Here Gunjan, Ibrahima and Seo in front of the wide angle HAXPES analyzer.

Luis Azevedo Antunes earned his bachelor’s degree in Physical Engineering and a master’s degree in Micro- and Nanotechnology from the Munich University of Applied Sciences. During his master’s program, he spent a semester abroad at Clemson University in the USA. He received the Georg-Simon-Ohm Award for his master’s thesis titled “The Effects of Oxygen Defects on the Formation of the Ferroelectric Phase in Doped HfO2, Based on Density Functional Calculations.”, providing the motivation to pursue a Ph.D. in the same field. He is part of the team which secured second place at the Merck Innovation Cup for their work on neuro-inspired AI inference acceleration.

 Luis has recently joined LENSIS as an external collaborator from the Munich University of Applied Sciences, a project partner of the D3PO initiative, “Dopant and Defect Physics for Device Optimization in Hafnium Oxide-based Devices.” This bilateral ANR-DFG project is in collaboration with CEA/LETI (Grenoble) and NaMLab (Dresden).

We are happy to announce that our work have been recently published on Applied Physics Letters. This article is entitled “Oxygen vacancy engineering in Si-doped, HfO2 ferroelectric capacitors using Ti oxygen scavenging layers”.

https://doi.org/10.1063/5.0205142

As part of our new partnership with Taiwan's National Yang Ming Chiao Tung University, Dr Sourav De presented a "Perspective Roadmap of Advanced HfO2-based Ferroelectric Field Effect Transistors" at the 8th Electron Devices Technology & Manufacturing Conference (EDTM) in Bangalore, India. You can find all the details on the publication section or directly here: https://doi.org/10.1109/EDTM58488.2024.10511366

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/