Test of the Wiedemann-Franz law in an optimally-doped cuprate

Abstract

We present a study of heat and charge transport in Bi${}_{2+x}$Sr${}_{2-x}$CuO${}_{6+\delta }$ focused on the size of the low-temperature linear term of the thermal conductivity at optimal doping level. In the superconducting state, the magnitude of this term implies a d-wave gap with an amplitude close to what has been reported. In the normal state, recovered by the application of a magnetic field, measurement of this term and residual resistivity yields a Lorenz number $L={\kappa }_N{\rho }_0/T=1.3\pm 0.2L_0$. The departure from the value expected by the Wiedemann-Franz law is thus slightly larger than our estimated experimental resolution.

arXiv commentFinal published version

References in corpus (22)

• Impurity-Induced Quasiparticle Transport and Universal Limit Wiedemann-Franz Violation in d-Wave Superconductors
• Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors
• Superconducting Gap Anisotropy and Quasiparticle Interactions: a Doping Dependent ARPES Study
• Heat Transport in a Strongly Overdoped Cuprate: Fermi Liquid and Pure d-wave BCS Superconductor
• Thermal Conductivity across the Phase Diagram of Cuprates: Low-Energy Quasiparticles and Doping Dependence of the Superconducting Gap
• Metal-to-Insulator Crossover in the Low-Temperature Normal State of Bi_{2}Sr_{2-x}La_{x}CuO_{6+δ}
• Universal Heat Conduction in YBa_2Cu_3O_6.9
• Thermal transport in a Luttinger liquid
• Low-Energy Quasiparticles in Cuprate Superconductors: A Quantitative Analysis
• Breakdown of Fermi-liquid theory in a cuprate superconductor
• The ground state of heavily-overdoped non-superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Fractionalization in the cuprates: Detecting the topological order
• Carrier concentrations in Bi_{2}Sr_{2-z}La_{z}CuO_{6+δ} single crystals and their relation to Hall coefficient and thermopower
• Measurement of an Anisotropic Energy Gap in Single Plane Bi_2Sr_(2-x)La_xCuO_(6+d)
• Evolution of the resistivity anisotropy in Bi_{2}Sr_{2-x}La_{x}CuO_{6+δ} single crystals for a wide range of hole doping
• Evidence for field-induced excitations in low-temperature thermal conductivity of Bi_2Sr_2CaCu_2O_8
• Low-temperature electronic heat transport in La_{2-x}Sr_{x}CuO_{4} single crystals: Unusual low-energy physics in the normal and superconducting states
• Magnetic-Field-Induced Localization of Quasiparticles in Underdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ Single Crystals
• Field-Induced Thermal Metal-to-Insulator Transition in Underdoped LSCO
• Effect of controlled disorder on quasiparticle thermal transport in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$
• Transport properties in the d-density wave state: Wiedemann-Franz law
• Measuring thermal conductivity in extreme conditions: sub-Kelvin temperatures and high (27 T) magnetic fields

Cited by in corpus (13)

• On the Lorenz number of multi-band materials
• Multiband superconductivity in the heavy fermion compound PrOs4Sb12
• Wiedemann-Franz law in the underdoped cuprate superconductor YBa2Cu3Oy
• Heat transport in Bi_{2+x}Sr_{2-x}CuO_{6+δ}: departure from the Wiedemann-Franz law in the vicinity of the metal-insulator transition
• Metal-to-insulator crossover and pseudogap in single-layer compound Bi${}_{2+x}$Sr${}_{2-x}$Cu${}_{1+y}$O${}_{6+\delta }$ single crystals in high magnetic fields
• Primary thermometry in the intermediate Coulomb blockade regime
• The Lorenz number in the optimally doped and underdoped Eu-123 superconductor
• Enhancement of the Hall-Lorenz number in optimally doped YBa2Cu3O_7-d
• Vortex-like excitations in a non-superconducting single-layer compound Bi${}_{2+x}$Sr${}_{2-x}$CuO${}_{6+\delta }$ single crystal in high magnetic fields
• Low-Temperature Thermal Conductivity of Superconductors With Gap Nodes
• Coexisting Holes and Electrons in High-Tc Materials: Implications from Normal State Transport
• Superconducting materials - a topical overview
• Fluctuating Cu-O-Cu Bond model of high temperature superconductivity in cuprates