title: Fermi liquid behavior of the in-plane resistivity in the pseudogap state of YBa2Cu4O8.
abstract: Our knowledge of the ground state of underdoped hole-doped cuprates has evolved considerably over the last few years. There is now compelling evidence that, inside the pseudogap phase, charge order breaks translational symmetry leading to a reconstructed Fermi surface made of small pockets. Quantum oscillations [Doiron-Leyraud N, et al. (2007) Nature 447(7144):565-568], optical conductivity [Mirzaei SI, et al. (2013) Proc Natl Acad Sci USA 110(15):5774-5778], and the validity of Wiedemann-Franz law [Grissonnache G, et al. (2016) Phys Rev B 93:064513] point to a Fermi liquid regime at low temperature in the underdoped regime. However, the observation of a quadratic temperature dependence in the electrical resistivity at low temperatures, the hallmark of a Fermi liquid regime, is still missing. Here, we report magnetoresistance measurements in the magnetic-field-induced normal state of underdoped YBa2Cu4O8that are consistent with a T2resistivity extending down to 1.5 K. The magnitude of the T2coefficient, however, is much smaller than expected for a single pocket of the mass and size observed in quantum oscillations, implying that the reconstructed Fermi surface must consist of at least one additional pocket.
authors.affiliation: Laboratoire National des Champs Magnétiques Intenses-European Magnetic Field Laboratory (CNRS-Institut National des Sciences Appliquées-Université Grenoble Alpes-Université Paul Sabatier), Toulouse 31400, France; cyril.proust@lncmi.cnrs.fr n.e.hussey@science.ru.nl.
authors.forename: Cyril
authors.initials: C
authors.lastname: Proust
authors.affiliation: Laboratoire National des Champs Magnétiques Intenses-European Magnetic Field Laboratory (CNRS-Institut National des Sciences Appliquées-Université Grenoble Alpes-Université Paul Sabatier), Toulouse 31400, France.
authors.forename: Baptiste
authors.initials: B
authors.lastname: Vignolle
authors.affiliation: Laboratoire National des Champs Magnétiques Intenses-European Magnetic Field Laboratory (CNRS-Institut National des Sciences Appliquées-Université Grenoble Alpes-Université Paul Sabatier), Toulouse 31400, France.|Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland.
authors.forename: Julien
authors.initials: J
authors.lastname: Levallois
authors.affiliation: Superconductivity Research Laboratory, Tokyo 135-0062, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Adachi
authors.affiliation: High Field Magnet Laboratory-European Magnetic Field Laboratory, Radboud University, 6525 ED Nijmegen, The Netherlands; cyril.proust@lncmi.cnrs.fr n.e.hussey@science.ru.nl.|Institute of Molecules and Materials, Radboud University, 6525 AJ Nijmegen, The Netherlands.
authors.forename: Nigel E
authors.initials: NE
authors.lastname: Hussey
keywords: Fermi liquid; Fermi surface; electrical transport; high Tc superconductivity