Taillefer Group

Quantum materials research group at the Université de Sherbrooke

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News

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New article in PRX

December 2019

Using thermal conductivity measurements, we investigated the issue of potential mobile spin excitations in a promising quantum spin liquid candidate and found no evidence that spinons contribute to heat transport. Despite measuring eight high-quality crystals, we were not able to reproduce the findings of a previous report on the same material that had found the opposite result.


Thermal conductivity of the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2: No evidence of mobile gapless excitations
P. Bourgeois-Hope et al, PRX 9, 041051 (2019).

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Relève étoile Louis-Berlinguet Prize

October 2019

Congratulations to Gaël Grissonnanche, a post-doctoral student in Taillefer's group, for winning the Relève étoile Louis-Berlinguet. This award, granted but the Fonds de recherche- Nature et technologies (Québec), recognizes the excellence of research conducted by university-level students. Gaël received this award following her article Giant thermal Hall conductivity in the pseudogap phase of cuprate superconductors published in Nature in July 2019.


Giant thermal Hall conductivity in the pseudogap phase of cuprate superconductors
G. Grissonnanche et al. Nature 571, 376-380 (2019).

Giant thermal Hall effect reveals novel particles in high-temperature superconductors
Nicolas Doiron-Leyraud, Institut Quantique

Crafting new particles in the core of superconducting materials
Hugues Vincelette, Institut Quantique

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Worshop LIA - CNRS - Université de Sherbrooke

October 2019

The international colloquium on quantum circuits and materials was held in Jouvence from October 2nd to 4th. All of the Taillefer group attended to discuss the latest advances in the field of quantum materials with our French collaborators.
Taking its roots in the decade-long collaborations between French researchers and members of the Physics Department of the Université de Sherbrooke, the LIA (International Associated Laboratory) on quantum circuits and materials was created in 2016 to strengthen research collaborations across the France-Canada axis.


Website
Laboratoire de Circuits et Matériaux Quantiques

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