Missions

The recruited researcher will be responsible for studying and characterizing complex spin textures at the atomic scale using a scanning tunneling microscope (STM) functionalized with a nickelocene molecule. They will implement advanced tunneling spectroscopy techniques to probe local exchange interactions and analyze surface magnetic states in ultrathin materials. Only candidates who have defended their PhD and have not yet undertaken a postdoctoral position are eligible.

Activités

The candidate will carry out scanning tunneling microscopy (STM) experiments in a cryogenic and ultra-high-vacuum environment, including the preparation and functionalization of STM tips with nickelocene molecules. They will perform topographic and spectroscopic measurements aimed at probing the inelastic excitations and Zeeman states of the molecular tip. As part of the project, they will be responsible for creating, imaging, and manipulating magnetic nano-skyrmions in ultrathin iron films grown on Ir(111), and for mapping their spin textures at the atomic scale using quantum magnetometry techniques. The work will also involve processing, analyzing, and interpreting STM/S data, contributing to instrumental development and the optimization of experimental protocols, and disseminating results through scientific publications and conference presentations. The candidate will interact regularly with theoretical and experimental teams in the laboratory and may also participate in the supervision of interns or doctoral students.

Compétences

The candidate must have a strong background in solid-state physics, magnetism, or nanoscience, together with proven experience in scanning tunneling microscopy, preferably under low-temperature and ultra-high-vacuum conditions. A solid understanding of spin-related phenomena, exchange interactions, and complex magnetic textures is desired. Skills in experimental data analysis, modeling, or physical interpretation will be particularly appreciated. The position requires strong experimental rigour, excellent organizational abilities, problem-solving skills, and the capacity to work within a multidisciplinary team. Good communication skills in English (C1 level), both written and oral, are essential for disseminating results and integrating effectively into the project.

Contexte de travail

The position is hosted at the Institute of Physics and Chemistry of Materials of Strasbourg (IPCMS, UMR 7504), a joint CNRS–University of Strasbourg research unit renowned for its work in nanoscience, quantum materials, and surface physics. The successful candidate will join a team specializing in the study of magnetic phenomena at the atomic scale, working in close interaction with other groups within the institute as well as with several European academic partners active in spintronics and quantum magnetometry. The work will rely on state-of-the-art instrumentation, in particular a low-temperature (1.4 K) STM operating under ultra-high vacuum and magnetic fields up to 5 Tesla, along with cryogenic facilities and equipment for the growth of ultrathin materials. The laboratory is located on the Cronenbourg campus, which is easily accessible by public transport and benefits from on-site university dining services. The position involves certain constraints related to the operation of the instruments (occasional work at off-peak hours, interventions in the evening or early morning, and infrequent weekend activity), as well as travel for collaborations or conferences. Particular care is required when handling cryogenic equipment, UHV systems, and superconducting magnets.

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.

Contraintes et risques

The activities will be carried out in a cryogenic and ultra-high-vacuum environment that requires strict adherence to technical procedures and safety rules, particularly when handling very low-temperature equipment, high-vacuum systems, or superconducting magnets. The position also involves periods of work with sensitive instruments, requiring availability and sustained attention, as well as the ability to intervene on complex experimental systems. Although the work does not present unusual risks, it demands constant vigilance to ensure the safety of operations and the stability of measurements.