Actualités


Martien Den Hertog, Médaille de bronze du CNRS 2019

Chercheuse en physique des matériaux, spécialisée dans la microscopie électronique en transmission sur des nano-objets semi-conducteurs, Martien Den Hertog sera récompensée vendredi 29 novembre 2019 à l’occasion de la remise des médailles Talents CNRS. Félicitations !

Félicitations à Olivier Arcizet pour son ERC Consolidator Grant

En permettant la conversion d’une force en un déplacement mesurable, les oscillateurs mécaniques ont depuis toujours joué un rôle central en physique. La suite ici.

Gérard Mourou, Nobel de physique, en visite à Néel !

Mardi 15 octobre 2019, l’Institut Néel a l’honneur de recevoir Gérard Mourou, Nobel de physique 2018, pour une visite du laboratoire de 14h à 15h30. La suite ici.

Publications récentes

Epsilon iron as a spin-smectic state

PNAS, October 8, 2019 116 (41) 20280-20285 Pdf

Sound-driven single-electron transfer in a circuit of coupled quantum rails

Nature Communications, 10, 4557 (2019) Pdf

Faits marquants

New ceramics for domestic and cryogenic magnetic refrigeration

A continuously growing energy demand worldwide intensifies the need for development of new, high-performance energy conversion and storage technologies. A large part of energy consumption is due to cooling in the industrial sectors such as food conservation as well as air-conditioning for housing, buildings and vehicles. Hence, refrigeration appears as a major concern for the future involving both energy consumption and impact on the environment. To date, the energy for refrigeration comes primarily from fossil fuels which produce CO2, and it uses HFCs (hydrofluorocarbon type) gases for the classical gas-compression cycle. Both these gases pollute the environment. From this point of view, cooling based on using magnetocaloric ceramic oxides as the refrigerant material appears as a promising alternative. Full text.

Heat transport in the quantum regime has its own limits !

At extremely low temperature, the transport of matter, charge or energy through a very narrow "quasi one-dimensional" channel can be quantized. This has been demonstrated for a long time, for example for a current of electrical charges. Indeed, electrical conductance across a quantum dot takes values that are an integer multiple of the quantum of electrical conductance 2e2 /h, where e is the charge of the electron and h is the Planck constant. We expect to observe the same quantization phenomenon for heat currents, a regime that would no longer follow Fourier’s law, the classical law of heat conduction. As this quantization has been shown clearly for electrons and photons, it remains a mystery for phonons, the quanta of vibration of the crystal lattice. Full text.


Séminaires

Thursday 19 December 14:00

Séminaire Magnétisme non conventionnel

Tristan LUGAN (Institut Néel)

"Topological Nematic Spin Liquid on the Square-Kagome Lattice"br>

Événements

9-11 Décembre 2019, ESRF

CRG : Journées Prospectives

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