The word of the academicians – Thierry Giamarchi explains the word « glass »

The word of the academicians – Thierry Giamarchi explains the word « glass »

On the occasion of its 350th birthday, the French Academy of Sciences produced short films entitled « The word of the academicians ». Nineteen academicians explain in three minutes a word of science such as, chaos, climate, innovation, memory, nano, planet, irrational, etc. Thierry Giamarchi, academician, took up the challenge and explains the word « glass » (in French…

Nicolas Gisin’s and Thierry Giamarchi’s conferences at the French Academy of Sciences

Nicolas Gisin’s and Thierry Giamarchi’s conferences at the French Academy of Sciences

Thierry Giamarchi and Nicolas Gisin gave a conference during the French Academy of Sciences colloquia, organized on the theme « Hundred years of quantum revolutions ». Thierry Giamarchi, « Peut-on toucher la Mécanique Quantique ? » Nicolas Gisin « Quand la Science rejoint la science-fiction » See the videos  

Topological properties of exotic matter – Interview with Thierry Giamarchi, CQFD, RTSla1ère
Selectively conductive or insulating

Selectively conductive or insulating

  Some materials hold surprising — and possibly useful — properties: Neodymium nickel oxide is either a metal or an insulator, depending on temperature. This characteristic makes the material a potential candidate for transistors in modern electronic devices. To understand how neodymium nickel oxide makes the transition from metal to insulator and vice versa, researchers…

Observation of Fermi arcs in the type-II Weyl semimetal MoTe2

Observation of Fermi arcs in the type-II Weyl semimetal MoTe2

Crystalline solids have particlelike, low-energy excitations — so-called quasiparticles — that describe collective states of many electrons interacting with the atomic nuclei. In 2015, scientists predicted the existence of an exotic new quasiparticle, dubbed a type-II Weyl fermion, that breaks the Lorentz invariance of special relativity and has no direct analog in the standard model…

Superconductivity: after the scenario, the staging

Superconductivity: after the scenario, the staging

Superconductivity with a high critical temperature (high Tc) continues to present a theoretical mystery. While this phenomenon is experimentally well established, no scientist has managed to explain its mechanism. In the late 90’s, the British physicist Anthony Leggett proposed a scenario based on the Coulomb energy. Today, researchers at the University of Geneva (UNIGE), Switzerland,…

Supraconductivité: après le scénario, la mise en scène

Supraconductivité: après le scénario, la mise en scène

La supraconductivité à haute température critique (haute Tc) reste pour l’heure un mystère théorique. Si ce phénomène est observé expérimentalement, aucun scientifique n’est encore parvenu à expliquer son mécanisme. Dans les années 90, le Britannique Anthony Leggett a proposé un scénario reposant sur l’énergie de Coulomb. Aujourd’hui, des chercheurs de l’Université de Genève (UNIGE), en…

Le bismuth pour de futures valléetroniques

Le bismuth pour de futures valléetroniques

La valléetronique (valleytronics en anglais) est un domaine émergent de l’électronique où l’on joue avec la dynamique des électrons plutôt qu’avec leur charge électrique. Les quantités de mouvements atteignables des électrons par rapport au réseau atomique se situent autour des minimas de la bande de conduction (les dites vallées). C’est pourquoi, les électrons acquièrent un…

Bismuth for future valleytronics

Bismuth for future valleytronics

Valleytronics is an emerging field in electronics, where one plays with the momentum of electrons rather than with their electric charge. As the attainable momenta cluster near the minima (the so-called valleys) of the conduction band, the electrons effectively acquire an additional valley index, similar to the well-known charge and the spin. This extra ‘flavor’…

A positive step towards negative capacitance – towards more energy-efficient transistors

A positive step towards negative capacitance – towards more energy-efficient transistors

An international collaboration involving researchers from the University of Geneva, and colleagues from England, Spain, France and Luxembourg has demonstrated that destabilising the spontaneous polarisation of a special class of materials known as ferroelectrics gives rise to the phenomenon of negative capacitance that could one day lead to transistors with reduced power consumption. This research…

Réalisation : Sur Mesure concept