Publications
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2023
Physical Review Materials | ArXiv | My first published work using deep learning. Oumar did most of the heavy lifting on this, and the team in Sherbrooke complemented by learning and teaching us classical machine learning methods. My code to download materials dataset for this project became my most reused code.
2022
PRB | ArXiv | My favourite project (and the least cited one). It was mostly completed in December 2018, during my first postdoc. It took three years until we could agree on the way to present it. You can find the code to reproduce the results on gihub.
Nature | ArXiv | For this work, Gaël Grissonanche and I implemented a computation of magnetoresistance in high-temperature superconductors. Brad Ramshaw and PhD student Yawen Fang (from Cornell) worked in parallel on a C++ version. Reproducing the results independently allowed to find a few improvements to the method and confirm impressive results.
PRX | ArXiv | This paper showcase counter-intuitive results for measurements of the thermopower in cuprates superconductors. My contributions are the code for phenomenological modeling of the experiments and many insightful discussion with Adrien, Gaël, Antoine, Jernej and Louis.
2021
Nature | ArXiv | In this paper, we show that conductivity in the stange metal phase of cuprates can be modeled with Boltzmann transport theory, something most people thought impossible. Our code for the phenomenological model is available on gihub.
2019
Physical Review B | ArXiv | This paper was 5 years in the making. It all started when André-Marie noticed subgap structures in the superconducting gap obtained with CDMFT and hired Jyotirmoy for an internship to study these. Since similar subgap structures are found in high-temperature superconductors, we were very excited about this discovery. After a lot of work trying to explain the source of these subgap structures, we found they are caused by the artificial broken translation invariance inherent to CDMFT; they are an artefact. We were disappointed. However, in cuprates, we know that charge order also breaks translation invariance. Could the artificial translation invariance breaking in CDMFT cause similar effects to the density waves in cuprates? To adress this question correctly, we had to acquire a better understanding of the consequences of charge order and broken translation invariance in lattice models which lead to my my whole PhD work. I am very happy to finally share the work that started it all: an analysis of broken translation invariance in CDMFT.
ArXiv | Nature | This paper presents groundbeaking experiments for the specific heat in cuprates. I contributed theoretical calculations that show these experiments cannot be explained with the van Hove singularity expected in this system because of three dimensional considerations.
Physical Review B | ArXiv | This paper is the fruit of very long hard work by Alexandre Foley on a new parametrization of CDMFT to study the coexistance of antiferromagnetism and superconductivity in the Hubbard Model. This new parametrization is compared to my Master's thesis results which used an older 'simpler' parametrization.
2018
2017
Physical Review B | ArXiv | This paper makes clear predictions for the Seebeck coefficient, the Hall coefficient, and specific heat in three models for the pseudogap of high-temperature superconductors. To my knowledge, these predictions have not been confirmed experimentally, which reveals a common weakness of these models, as discussed in the paper.
Physical Review B | ArXiv | The main work for this paper was done by my colleague Maxime Charlebois. He used the code developped for my paper on subgap structures (just below) to study the Hall effect in incomensurate systems. Togheter with colleague Alexandre Foley, we found a way to efficiently compute the electronic velocity in these systems (appendix of the paper) so that Maxime could compute the Hall resistivity.
Physical Review B | ArXiv | This paper was a large scale exploration of density waves and their effects on the superconducting gap of high-temperature superconductors. Although it was not the first time such results were reported, the large space of parameters explored sheds new light on the issue. The main highlight of the paper is without doubt the last figure, which was first drawn spontaneously on a blackboard during a heated discussion with Maxime Charlebois. | Code published on physique.usherbrooke.ca/codes_sources/, look for "oneBuddy.tar.gz".
2014
2013
IEEE | Access required
2012
OSA Publishing | Access required
2010
Nanoscale Research Letters | Full text in open access