Missions

We are looking for a creative postdoctoral research scientist to join the team at CEMES-CNRS developing in situ and operando electron holography (I3EM). For over ten years, the group has been developing the necessary instrumentation and methodology, from dedicated specimen preparation to electrical contacting, automation and modeling. We can now successfully operate electrically contacted nanostructures and nanodevices whilst measuring the resulting electric, magnetic and strain fields. Our recent work has shown that in-situ and operando experiments produce exciting and unexpected results [1-4]. We aim to continue these developments to understand the behaviour of a variety of nanoscale devices such as nanocapacitors, transistors, ferroelectric thin films and devices.
Part of the successful candidate's duties will be to accompany external users with electron holography experiments within the METSA network and international collaborations. We also encourage the exploration of new in situ and interferometric techniques.
The initial contract of 24 months is extendable to 36 months (3 years). Starting date flexible.
[1] L. Zhang, M. H. Raza, R. Wu, K. Gruel, C. Dubourdieu, M. Hÿtch, C. Gatel, Advanced Materials, 2413691 (2024). Quantification of interfacial charges in multilayered nanocapacitors by operando electron holography. 10.1002/adma.202413691
[2] L. Zhang, F. Lorut, K. Gruel, M.J. Hÿtch, and C. Gatel, Nano Letters 24, 5913-5919 (2024). Measuring electrical resistivity at the nanoscale in phase-change materials. 10.1021/acs.nanolett.4c01462
[3] C. Gatel, R. Serra, K. Gruel, A. Masseboeuf, L. Chapuis, R. Cours, L. Zhang, B. Warot-Fonrose, and M. J. Hÿtch, Phys. Rev. Lett. 129, 137701 (2022). Extended charge layers in metal-oxide-semiconductor nanocapacitors revealed by operando electron holography. 10.1103/PhysRevLett.129.137701, hal-03787333
[4] M. Brodovoi, K. Gruel, A. Masseboeuf, L. Chapuis, M. Hÿtch, F. Lorut, and C. Gatel, Appl. Phys. Lett. 120, 233501 (2022). Mapping electric fields in real nanodevices by operando electron holography. 10.1063/5.0092019, hal-03752638

Activités

The main activities will be:
• Perform (in situ) electron holography experiments
• Study the nanoscale physics of thin films and devices
• Accompany external users in TEM experiments
• Develop novel forms of electron interferometry

Compétences

We are looking for a candidate interested in developing in situ experiments on nanostructures. Previous experience with electron holography is not necessary but candidates should be skilled in quantitative electron microscopy or in situ techniques and willing to learn. Knowledge of the physics of magnetism and/or ferroelectric materials and/or microelectronics devices is a definite plus. The successful candidate should have good team spirit, dedicated work ethic and fluent in written and spoken English.

Contexte de travail

CEMES-CNRS is an internationally recognized laboratory in TEM studies as well as instrumental and methodological developments. The laboratory has many international collaborations and is founding member of the French national network for electron microscopy (METSA).
Electron holography will be carried out on our I2TEM microscope dedicated to in situ interferometry: a Hitachi HF-3300 (C) equipped with a cold-field emission gun, additional Lorentz stage placed above the objective lens for field-free imaging, an image corrector for wide fields of view (CEOS B-COR), several electron biprisms, direct electron detection camera (K3, Gatan) and imaging filter (GIF Quantum ER, Gatan). The microscope has automated drift control for in-situ experiments [5]. Chip-based holders for in-situ biasing and current injection complete the setup.
Extensive specimen preparation facilities include a dual-beam FIB-SEM (ThermoFisher Helios Nanolab 600i) equipped with Omniprobe micromanipulator and 5 gas injectors.
The laboratory also has privileged access to the nearby nanocharacterisation facility (Castaing centre) which houses a probe-corrected JEM-ARM200F (JEOL) equipped with EDS and EELS.
[5] C. Gatel, J. Dupuy, F. Houdellier, M.J. Hÿtch, Appl. Phys. Lett. 113, 133102 (2018). Unlimited acquisition time in electron holography by automated feedback control of transmission electron microscope. 10.1063/1.5050906, hal-01884057v1

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.