News

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.

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.

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.

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).

November 23, 2023

Researchers from GEMaC have demonstrated an important step for the realization of power electronics devices.

August 25, 2023

Researchers at GEMaC have published two complementary studies demonstrating that single photons emitted by a two-dimensional material are coherent, a property that is essential for applications in quantum computing. This work was the subject of an INP highlight.

May 25, 2022

Editor’s Choice and one of the most downloaded papers of the ‘Materials’ (MDPI) journal in the first five months of the year, this review discusses the application of ultra-wide bandgap semiconductors in power electronic devices, focusing in particular on gallium oxide.

January 31, 2022

Researchers from GEMaC laboratory have developed an effective electro-elastic model to simulate phase transitions in spin crossover crystals. The resolution of this model is 50 times faster than the traditionally used model, which has allowed them to reveal a wide variety of complex phenomena.

November 14, 2021

Strontium and calcium vanadates (SrVO3 and CaVO3) are perovskite oxides. They are materials with multiple potential functions and applications. Here is an overview of recent advances, to which GEMaC has made a major contribution.

September 17, 2021

GEMaC researchers show how the conductivity of the spinel material ZnGa2O4 can be controlled over a very wide range, opening up applications in ultra-high power electronics and deep ultraviolet optoelectronics.

June 25, 2021

GEMaC researchers, in partnership with the LEM (CNRS-Onera), have produced and characterised an original and unexpected crystal structure in nanoscale zinc sulphide (ZnS) wires.

June 18, 2021

By exciting a two-dimensional material with an electron microscope beam, our researchers and their collaborators have uncovered new sources of single photons in crystalline materials.

May 31, 2021

At UVSQ, the GEMaC laboratory is contributing its expertise on the growth and characterisation of diamonds by cathodoluminescence to the e-Diamant project.

February 3, 2021

A look back at the incredible story of the Petit Propulseur Innovant (PPI) and its successor the µ-PPI, whose prototypes were invented, designed and built at GEMaC.

December 1, 2020

We would like to welcome two new GEMaC members hired by UVSQ, Jean-Michel Chauveau (Professor) and Sébastien Colinot (Assistant Engineer).

November 27, 2020

This project is focused on the new generation transmission electron microscope and involves several laboratories in Île-de-France region, including GEMaC. It will be funded via SESAME 2020 program.

November 2, 2020

Increasing the voltage and avoiding breakdown of materials used in power electronics remain a current challenge. The researchers broke a record for the critical electric field with a value of 13.2 MV/cm. This result has been selected as "News from Physics Institute" of CNRS.

July 3, 2020

The work of GEMaC researchers and engineers is on the cover of Physica Status Solidi RRL of June.

May 28, 2020

Flagship Graphene announced a transition to Core 3, the fourth funding round of the €1 billion research initiative funded by the European Commission.

May 5, 2020

During the health crisis linked to the Covid19 pandemic, UVSQ along with other French universities had to close its doors on March 16, 2020. Nevertheless, the activities of the GEMaC continued unabated.

March 19, 2020

French and Tunisian researchers evidence and explain very broadband white light emission that is comparable to the reference white light.

March 2, 2020

New, up-to-date and adjustable design suitable for all screen types (computer, tablet, mobile phone) as well as a updated structure based on targeted and accessible content.

February 28, 2020

The plasmonic properties of a nanohole array probed by a single nanocrystal grafted at the tip of an optical near-field probe: this work by GEMaC researchers was published in the journal Nanophotonics in February 2020.

January 23, 2020

GEMaC and ILV researchers and engineers demonstrate a simple and promising way to transfer epitaxial oxide layers onto silicon

November 4, 2019

Researchers from GEMaC and LPQM (ENS Paris-Saclay) have developed a photonic cavity incorporating a light nanoemitter for efficient quantum light emission.

September 11, 2019

Bismuth iron garnet, a material with already remarkable properties, becomes conductive with adjustable resistivity.

August 15, 2019

Researchers from GEMaC and LuMIn labs unveil charge recombination dynamics in 2D hybrid perovskites, a promising new class of semiconductor materials.

May 1, 2019

The University of Versailles St-Quentin-en-Yvelines joined the European Graphene Flagship research consortium.

April 25, 2019

Hexagonal boron nitride (hBN) emits ultraviolet light with an unusually high intensity for an indirect semiconductor. This apparent contradiction was finally explained by the particular nature of the excitons, revealed both by quantitative measurements and by their modelling.

April 25, 2018

For the first time, researchers have succeeded in manufacturing large-diameter substrates of both "n" and "p" type β-Ga2O3 semiconductors, making it possible to envision the development of components for both power electronics and optoelectronics in the far ultraviolet.

May 19, 2025

Edgar Butanovs
Institute of Solid State Physics, University of Latvia

March 11, 2025

Philippe Pajot
Réacteur en chef à La Recherche

December 20, 2024

Yan Sun
LPS, Université Paris-Saclay, Orsay, France

November 21, 2024

Muriel Boulakia
LMV - UVSQ

April 1, 2025  - March 31, 2028

PhD project at GEMaC, joint with Néel Institute (Grenoble)Application via CNRS portal at https://emploi.cnrs.fr/Offres/Doctorant/UMR8635-KARBRE-015/Default.aspx

February 1, 2025  - August 30, 2025

February 1, 2025  - July 31, 2028

Stage M1 ou M2

January 17, 2025

Présentée par Trang Nguyen
thèse dirigée par Damien Garrot et Emmanuelle Deleporte

December 10, 2024

Présentée par Nour el islam Belmouri
thèse dirigée par Kamel Boukheddaden

December 19, 2023

Présentée par Clarisse Fournier
thèse dirigée par Jean-Pierre Hermier et Aymeric Delteil

December 3, 2021

Présentée par Damien AUREAU
Discipline : chimie - scieence des matériaux
Laboratoire : ILV

November 30, 2021

Présentée par Ahmed SLIMANI
Discipline : physique
Laboratoire : GEMaC

November 12, 2020

Présentée par Damien GARROT
Discipline : physique - milieux denses et matériaux
Laboratoire : GEMaC