A5064838854- Thermodynamic and Structural Properties of Metals and Alloys
- Quasicrystal Structures and Properties
- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Metallurgical and Alloy Processes
- X-ray Diffraction in Crystallography
- Phase-change materials and chalcogenides
- Glass properties and applications
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Intermetallics and Advanced Alloy Properties
- Transition Metal Oxide Nanomaterials
- Crystal Structures and Properties
- Topological Materials and Phenomena
- nanoparticles nucleation surface interactions
- Solid-state spectroscopy and crystallography
- Microstructure and mechanical properties
- Analytic and geometric function theory
- High-pressure geophysics and materials
- Advanced Battery Materials and Technologies
- Rare-earth and actinide compounds
- Microstructure and Mechanical Properties of Steels
- Advanced X-ray Imaging Techniques
- Magnetic and transport properties of perovskites and related materials
- Iron-based superconductors research
Science et Ingénierie des Matériaux et Procédés
2012-2023
Institut Laue-Langevin
2014-2021
Centre National de la Recherche Scientifique
2012-2020
Université Grenoble Alpes
2017-2020
CEA LITEN
2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2020
Institut polytechnique de Grenoble
2012-2020
École Polytechnique Fédérale de Lausanne
2018
École Polytechnique
2018
Université Joseph Fourier
2012
Engineering lattice thermal conductivity requires to control the heat carried by atomic vibration waves, phonons. The key parameter for quantifying it is phonon lifetime, limiting travelling distance, whose determination however at limits of instrumental capabilities. Here, we show achievement a direct quantitative measurement lifetimes in single crystal clathrate Ba7.81Ge40.67Au5.33, renowned its puzzling 'glass-like' conductivity. Surprisingly, transport dominated acoustic phonons with...
Blended negative electrodes with a mix of graphite and silicon are attractive solutions to extend the energy density lithium-ion batteries. Given huge volume expansion silicon, relative lithiation/delithiation both active materials upon cycling is crucial determine mechanical behavior electrode. It complicated however by potential hysteresis displayed silicon. We focus on blended anode 16 wt% carbon composite (SiC-C) at gravimetric capacity 1500 mAh.g−1 mixed 84 graphite. A multi-scale...
We have performed inelastic neutron scattering measurements on powder samples of the quasicrystal approximant, ${\mathrm{TbCd}}_{6}$, grown using isotopically enriched $^{112}\mathrm{Cd}$. Both quasielastic and distinct excitations were observed below 3 meV. The intensity measured in paramagnetic phase diverges as ${T}_{\mathrm{N}}\ensuremath{\sim}22$ K is approached from above. excitations, their evolution with temperature, are well characterized by leading term, ${B}_{2}^{0}{O}_{2}^{0}$,...
Exploiting the structural complexity of crystals at scale their unit cell is a well-established strategy in search for efficient materials energy conversion, which aims disentangling and separately engineering heat charge transport. This route has resulted discovery clathrates with exceptionally low lattice thermal conductivity but essentially unaffected tunable electronic properties. Although behaves similarly to one glasses, its origin fundamentally different. Indeed, phonons long lifetime...
Combining inelastic neutron and x-ray scattering with atomic scale simulation, we report on a comprehensive study of the lattice dynamics its relationship low thermal conductivity o-${\mathrm{Al}}_{13}{\mathrm{Co}}_{4}$ phase, periodic approximant (about 100 atoms per cell) to decagonal quasicrystal. The obtained experimental data, phonon lifetimes, temperature-independent can only be fully described by molecular simulations, using oscillating pair potential, when disorder 12 Al sites is...
The authors use inelastic neutron scattering to show that the lattice anharmonicity in a single crystal of complex type-I clathrate structure depends on transverse versus longitudinal phonon polarizations.
Complex metallic alloys are long-range ordered materials, characterized by large unit cells, comprising several tens to thousands of atoms [1]. These complex often consist characteristic, cluster building blocks, which in many cases show icosahedral symmetry. Numerous phases known, that can be described a rather simple way as the periodic or quasi-periodic packing such atomic clusters. The lattice dynamics CMAs has been subject both theoretical and experimental investigations view their...
Exploiting the structural complexity of crystals at scale their unit cell is a well-established strategy in search for efficient materials energy conversion, which aims disentangling and separately engineering heat charge transport. This route has resulted discovery clathrates with exceptionally low lattice thermal conductivity but essentially unaffected tunable electronic properties. Although behaves similarly to one glasses, its origin fundamentally different. Indeed, phonons long lifetime...