GEMAC

Our laboratory

The main mission of GEMaC laboratory is to run fundamental research with perspectives of application in the fields of physics and material science for tomorrow's electronics and information processing and storage.
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Our research

The research activities of our lab are based on a common expertise in physics and material science in the field of wide gap semiconductors, functional magnetic oxides, molecular materials and nanooptics
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Experimental facilities

The research activities in GEMaC are based on an important experimental infrastructure dedicated to material elaboration, growth, and characterisation, as well as investigation of their properties.
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Video presentation of the laboratory

PhD and habilitation defences

Intégration et contrôle cohérent de centres colorés dans le nitrure de bore hexagonal

December 15, 2025

Propriétés optiques et de spin dans les cristaux d’iodure de plomb méthylammonium

January 17, 2025

Modélisation des effets d'anisotropie et de frustration élastiques en 3D, et investigation par microscopie optique des transitions de phase du premier ordre thermo- et photo-induites dans les solides moléculaires à transition de spin

December 10, 2024

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Seminars and colloquia

2dplus2026 - Annual meeting 2026 of the GDR 2D+

September 28, 2026 - October 2, 2026

Workshop on Gallium Oxide and Related Materials (WGORM 2026)

September 24, 2026 - September 25, 2026

COLIBRI – Passerelles du Savoir – Phénomène El Niño

September 5, 2026

Développement de nouvelles sondes fluorescentes de l’altération des peintures à l’huile

July 21, 2026

Recyclable and Affordable Nanocomposite films for Water Purification

June 30, 2026

All seminars and colloquia

Job offers

Master and PhD theses

Towards the quest for non-linear photo-induced dynamic behaviors in spin-crossover molecular solids: Cryogenic optical microscopy and reaction-diffusion modeling

October 1, 2026 - September 30, 2029

Highlights

	Innovative materials for cooler, more energy-efficient buildings August 28, 2026 As part of a CNRS IEA (International Emerging Action) project, researchers from GEMaC, in collaboration with researchers from Sorbonne University in Abu Dhabi, have developed a novel numerical model to design smart coatings based on spin-transition materials, capable of naturally regulating the temperature of buildings. This breakthrough paves the way for façades that limit overheating in summer and reduce the need for air conditioning.
	Generation of indistinguishable photons via resonant laser control of defects in a 2D material February 23, 2026 Physicists have controlled the quantum state of an artificially created crystal defect using a resonant laser. This approach enabled them to generate indistinguishable photons, the building blocks of quantum optical information. This work was featured in a CNRS Physics highlight.
	The comic book ‘A Passion for Physics’, co-written by GEMaC researcher Marie-Amandine Pinault-Thaury, is now available in English! July 16, 2025 The Société Française de Physique's comic book, published in 2023 to mark its 150th anniversary, is now available in English. The book was co-written by Marie-Amandine Pinault-Thaury (CNRS researcher at GEMaC), Isabelle Mirebeau (CNRS researcher at LLB) and Aurélie Bordenave (scientific cartoonist).
	Pushing the Boundaries of Ga₂O₃ Technology for Energy and Power Electronics through Quantum Disorder June 3, 2025 A new study shows that, through phosphorus doping of β-Ga₂O₃, an exceptional p-type conductivity is obtained at room temperature, as well as a metal-insulator transition. These results open avenues for improving power electronics, essential to power grids and transport systems, and contributes to wider adoption of renewable energies.
	Efficient, bright single-photon emitters thanks to a silver mirror March 11, 2025 Researchers at GEMaC have coupled a nanometric layer of silver with a 2D material to unlock the secrets of the single-photon sources they have created in this crystal.
	Decoding the Mysteries of Spin-Crossover Materials: A Model to Explore Complex Phenomena October 23, 2024 Researchers have developed a model inspired by the Ising model to explain a wide range of fascinating behaviours observed in certain spin-crossover materials. Their work made the cover of ChemPhysChem.
	Blue diamonds to understand spin-orbit interaction April 11, 2024 Very high resolution optical absorption measurements have made it possible to understand the light spectrum of boron-doped synthetic diamond, as part of an international collaboration between GEMaC and Kyoto University (Japan).
	Native “imperfections” enables room-temperature p-type conductivity in β-Ga2O3 November 23, 2023 Researchers from GEMaC have demonstrated an important step for the realization of power electronics devices.

All the highlights