Taillefer Group

Quantum materials research group at the Université de Sherbrooke

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News

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Colloque LIA-CNRS-Université de Sherbrooke 2021

September 2021

The sixth meeting of the Franco-Canadian International Associated Laboratory (LIA) "Quantum circuits and materials" took place at Ax-les-Thermes in France from September 28 to October 1st, 2021. The members of the Taillefer group were present in large numbers! This symposium covered superconducting circuits and hybrid quantum devices on the one hand, and correlated systems and unconventional superconductivity on the other.

Building on the collaboration between French researchers and researchers from the Department of Physics of the University of Sherbrooke for several decades, the International Associated Laboratory (LIA) - Laboratory on Quantum Circuits and Materials (LIA LCMQ) was created in 2016 to strengthen research collaborations within the France-Canada axis.


Webpage of LIA
lia-crns-udes

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Planckian limit and linear resistivity : new discovery!

July 2021

In collaboration with an American team, Prof. Taillefer's group has just measured precisely what is mysteriously called the "Planckian limit" in strange metals (Nature 595, 667 (2021)). This limit, which seems to be determined by quantum mechanics and Planck's constant, imposes that when electrons collide at an extreme rate within matter, each electron has at least the Planckian time to rest before the next collision. The reasons for the Planckian limit remain a mystery.


Linear-in temperature resistivity from an isotropic Planckian scattering rate
Grissonnanche et al., Nature 595, 667 (2021).

A new quantum limit for electrons
Jon Farrow, CIFAR

A team from Institut quantique has identified what appears to be a new quantum limit for electrons
Communication IQ, Institut Quantique

Chaotic electrons heed ‘limit’ in strange metals
David Nutt, Cornell Chronicle

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Pr Louis Taillefer membre de la Royal Society of London

May 2021

Louis is now among the new members of the Royal Society of London. It is one of the oldest academic society in the world. Congratulations Louis for this honor!


A major scientific honor for Professor Louis Taillefer
Johanne Leroux, Institut Quantique

Entrevue avec Louis Taillefer, professeur au département de physique de l'UdeS
Stéphan Bureau, Bien entendu, Radio-Canada

Physicist Professor Louis Taillefer made Fellow of the Royal Society
Corpus Christi College, University of Cambridge

Research

Studying the electrons in quantum materials

Strong interactions between electrons is an inexhaustible source of intriguing collective properties. The quantum materials we study include unconventional superconductors, spin liquids, topological insulators and Weyl semimetals, among others. Our experimental approach consists of measuring the electric, thermal and thermoelectric transport properties of these materials under different conditions of temperature, magnetic field and pressure. These measurements allow us to explore the behaviour of electrons and to describe the underlying interactions.


Quantum materials

Unconventional superconductors, spin liquids, topological insulators, Weyl semimetals.

Superconductivity

Property of a material that allows it to transport an electric current with zero resistance and to expel a magnetic field.

Transport measurements

Electric resistivity, thermal conductivity, Hall effect, Seebeck effect, Nernst effect, Righi-Leduc effect.

Low temperatures

Two dilution fridges allow us to reach temperatures as low as a few dozen millikelvins.

Magnetic Field

Superconducting coils give us access to magnetic fields up to 20 T.

High Pressure

Our pressure cells can apply up to 2 GPa, the pressure of roughly 20 000 atmospheres.

The Laboratories

From the cryostats to the dilution fridges via the prep-rooms.

Photo : UdeS - Martin Blache

Contact us

Address

Département de Physique
Université de Sherbrooke
2500 boul. Université, Sherbrooke (Québec)
Canada J1K 2R1