J
Julien Levallois
Researcher at Centre national de la recherche scientifique
Publications - 12
Citations - 2101
Julien Levallois is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Fermi surface & Quantum oscillations. The author has an hindex of 10, co-authored 12 publications receiving 1979 citations. Previous affiliations of Julien Levallois include Institut national des sciences appliquées de Toulouse & University of Geneva.
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Journal ArticleDOI
Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor.
Nicolas Doiron-Leyraud,Cyril Proust,David LeBoeuf,Julien Levallois,J.-B. Bonnemaison,Ruixing Liang,Ruixing Liang,D. A. Bonn,D. A. Bonn,Walter Hardy,Walter Hardy,Louis Taillefer,Louis Taillefer +12 more
TL;DR: The observation of quantum oscillations in the electrical resistance of the oxygen-ordered copper oxide YBa2Cu3O6.5 establishes the existence of a well-defined Fermi surface in the ground state of underdoped copper oxides, once superconductivity is suppressed by a magnetic field.
Journal ArticleDOI
Electron pockets in the Fermi surface of hole-doped high-Tc superconductors.
David LeBoeuf,Nicolas Doiron-Leyraud,Julien Levallois,Ramzy Daou,J.-B. Bonnemaison,Nigel E. Hussey,Luis Balicas,Brad Ramshaw,Ruixing Liang,Ruixing Liang,D. A. Bonn,D. A. Bonn,Walter Hardy,Walter Hardy,S. Adachi,Cyril Proust,Louis Taillefer,Louis Taillefer +17 more
TL;DR: The observation of a negative Hall resistance in the magnetic-field-induced normal state of YBa2Cu3Oy and Y ba2Cu4O8, which reveals that these pockets are electron-like rather than hole-like, is reported, suggesting that a Fermi surface reconstruction also occurs in those materials, pointing to a generic property of high-transition-temperature (Tc) superconductors.
Journal Article
Electron pockets in the Fermi surface of hole-doped high-$T$c superconductors
David Leboeuf,Nicolas Doiron-Leyraud,Julien Levallois,Ramzy Daou,J.-B. Bonnemaison,Nigel E. Hussey,Luis Balicas,Brad Ramshaw,Ruixing Liang,Doug Bonn,Walter Hardy,Seiji Adachi,Cyril Proust,Louis Taillefer +13 more
Journal ArticleDOI
Small Fermi surface pockets in underdoped high temperature superconductors: observation of Shubnikov-de Haas oscillations in YBa2Cu4O8.
A. F. Bangura,J. D. Fletcher,Antony Carrington,Julien Levallois,Marc Nardone,B. Vignolle,Peter J Heard,Nicolas Doiron-Leyraud,David LeBoeuf,Louis Taillefer,Seiji Adachi,Cyril Proust,Nigel E. Hussey +12 more
TL;DR: Although small Fermi surface pockets may be expected from band-structure calculations in Y123-II, no such pockets are predicted for Y124, which implies that these small pockets are a generic feature of the copper oxide plane in underdoped cuprates.
Journal ArticleDOI
Lifshitz critical point in the cuprate superconductor YBa2Cu3Oy from high-field Hall effect measurements
David LeBoeuf,Nicolas Doiron-Leyraud,B. Vignolle,Mike Sutherland,Brad Ramshaw,Julien Levallois,Ramzy Daou,Francis Laliberte,O. Cyr-Choinière,Johan Chang,Younjung Jo,Luis Balicas,Ruixing Liang,Ruixing Liang,D. A. Bonn,D. A. Bonn,Walter Hardy,Walter Hardy,Cyril Proust,Cyril Proust,Louis Taillefer,Louis Taillefer +21 more
TL;DR: In this article, the Hall coefficient of cuprate superconductor YBa 2Cu3Oy was measured in magnetic fields up to 60 T for a hole concentration p from 0.078 to 0.152 in the underdoped regime.