Postdoctoral Researcher in Magneto-Optical Spectroscopy M/F

Job Description

Missions

The postdoctoral fellow will join the existing research activities of the Quantum Electronics group at LNCM-Toulouse, which focuses on the electronic properties of perovskites.
Semiconductor perovskite-based solar cells have had a significant impact on emerging photovoltaic (PV) research, with efficiencies exceeding 17% already achieved. However, to date, the most fundamental electronic properties of perovskites—such as carrier effective masses and exciton binding energy—remain poorly understood.
Currently, we are studying methylammonium lead triiodide using magneto-absorption in very high magnetic fields. Our findings show that the exciton binding energy at low temperature is as low as 16 meV. This value is three times smaller than previously thought and is low enough to completely transform our understanding of how these devices must operate. Furthermore, Landau level spectroscopy demonstrates that the reduced effective mass of 0.104me is also significantly smaller than previously assumed [Miyata et al., Nature Physics, 11, 582 (2015)]

Activity

Develop research activities in the field of perovskites using magneto-optical spectroscopy in pulsed fields up to 70T at LNCMI-T. Support the participation of the LNCMI in the European Magnetic Field Laboratory (EMFL) by assisting visiting researchers from the UK and Poland (EMFL partners) in performing magneto-optical experiments. Collaborate with other group members to conduct data analysis using commercial software (e.g., Origin) and develop new custom code for data processing (e.g., in MATLAB). Additionally, the candidate will supervise PhD and Master's students within the Quantum Electronics group and disseminate research findings through peer-reviewed publications and presentations at scientific meetings and conferences.

Your Profil

Skills

Spectroscopie magnéto-optique, physique de l'état solide, mécanique quantique, cryogénie.

Your Work Environment

The postdoctoral researcher will join the existing activities of the Quantum Electronics group, working alongside other members to make a major contribution to the project. Initially, the postdoc will be closely supervised by Paulina Plochocka and other group members while learning to perform magneto-optical measurements within the challenging environment of a pulsed magnetic field facility. The Quantum Electronics group is an international team (partially based at the University of Wroclaw, Poland), and the primary working language is English. The National High Magnetic Field Laboratory (LNCMI) is a research infrastructure that welcomes scientists from around the world for high-field experiments. As a member of the European Magnetic Field Laboratory (EMFL), the LNCMI operates across two sites: continuous fields in Grenoble (LNCMI-G) and pulsed fields in Toulouse (LNCMI-T). The laboratory's scientific activities encompass both internal and collaborative research.

Compensation and benefits

Compensation

between 3041€ et 4395€ brut mensuel selon expérience

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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