Thomas La Grange

Publications associées (38)

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High‐Entropy Magnetism of Murunskite

Henrik Moodysson Rønnow, Ivica Zivkovic, Thomas La Grange, Davor Tolj, Rongrong Cai

Murunskite (K 2 FeCu 3 S 4 ) bridges the two known families of high‐temperature superconductors, cuprates and iron‐pnictides, structurally and electronically. Like these families, murunskite exhibits an antiferromagnetic (AF)‐like response with an ordered ...

Wiley2025

Ultrafast momentum-resolved visualization of the interplay between phonon-mediated scattering and plasmons in graphite

Fabrizio Carbone, Ivan Madan, Alexey Sapozhnik, Thomas La Grange, Michele Puppin, Francesco Barantani

Scattering between charges and collective modes in materials governs phenomena such as electrical resistance, energy dissipation, and phase switching. Studying such scattering requires simultaneous access to ultrafast and momentum-resolved dynamics of sing ...

2025

Ultrafast generation of hidden phases via energy-tuned electronic photoexcitation in magnetite

Fabrizio Carbone, Ivan Madan, Thomas La Grange, Benoît Guilhem Michel Binh Truc, Giovanni Maria Vanacore, Gabriele Berruto, Francesco Pennacchio, Paolo Usai

Phase transitions occurring in nonequilibrium conditions can evolve through high-energy intermediate states inaccessible via equilibrium adiabatic conditions. Because of the subtle nature of such hidden phases, their direct observation is extremely challen ...

National Academy of Sciences2024

High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source

Henrik Moodysson Rønnow, Marco Grioni, Fabrizio Carbone, Jan Hugo Dil, Thomas La Grange, Michele Puppin, Fei Guo

The time- and angle-resolved photoemission spectroscopy (trARPES) allows for direct mapping of the electronic band structure and its dynamic response on femtosecond timescales. Here, we present a new ARPES system, powered by a new fiber-based femtosecond l ...

Aip Publishing2024

Unifying Optical Frequency Metrology with Free-Electron Spectroscopy

Tobias Kippenberg, Fabrizio Carbone, Rui Ning Wang, Alexey Sapozhnik, Yujia Yang, Thomas La Grange, Arslan Sajid Raja

We establish a frequency link across the microwave, optical, and free-electron domains by a photonic chip-based electron phase modulator driven by a continuous-wave laser locked to a fully stabilized optical frequency comb. ...

Institute of Electrical and Electronics Engineers Inc.2024

Charge Dynamics Electron Microscopy Nanoscale Imaging of Femtosecond Plasma Dynamics

Fabrizio Carbone, Ivan Madan, Thomas La Grange, Giovanni Maria Vanacore, Gabriele Berruto, Ido Kaminer, Simone Gargiulo, Luca Piazza, Francesco Barantani, Tom Theodorus Antonius Lummen

Understanding and actively controlling the spatiotemporal dynamics of nonequilibrium electron clouds is fundamental for the design of light and electron sources, high power electronic devices, and plasma-based applications. However, electron clouds evolve ...

AMER CHEMICAL SOC2023

Light-Induced Metastable Hidden Skyrmion Phase in the Mott Insulator Cu2OSeO3

Henrik Moodysson Rønnow, Arnaud Magrez, Fabrizio Carbone, Ivan Madan, Thomas La Grange, Benoît Guilhem Michel Binh Truc, Phoebe Marie Tengdin, Simone Gargiulo

The discovery of a novel long-lived metastable skyrmion phase in the multiferroic insulator Cu2OSeO3 visualized with Lorentz transmission electron microscopy for magnetic fields below the equilibrium skyrmion pocket is reported. This phase can be accessed ...

Wiley-V C H Verlag Gmbh2023

Unraveling the sign reversal of the anomalous Hall effect in ferromagnet/heavy-metal ultrathin films

Thomas La Grange

The sign reversal in the anomalous Hall effect (AHE) that occurs for material offers great prospects for AHE-based spintronic devices design. However, the mechanisms are still controversial in ultrathin ferromagnetic/heavy metal thin film systems due to th ...

AMER PHYSICAL SOC2023

Electron spectrometer calibration method

Tobias Kippenberg, Fabrizio Carbone, Alexey Sapozhnik, Yujia Yang, Thomas La Grange, Arslan Sajid Raja

The present invention concerns an energy dispersion calibration method for calibrating an electron spectrometer of an electron spectrometer system including at least one electron emission source, electron optics and the electron spectrometer. The method co ...

2023

Analytics at the nanometer and nanosecond scales by short electron pulses in an electron microscope

Thomas La Grange

Chemical reactions and phase transformations in nanometer-size objects may happen at very short timescales, so conventional characterization tools are not applicable. A new technique combining high spatial and temporal resolution is ultrafast (or dynamic) ...

SPRINGER2022

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