Investigation of Planckian behavior in a high-conductivity oxide: PdCrO${}_2$

Abstract

The layered delafossite metal PdCrO${}_2$ is a natural heterostructure of highly conductive Pd layers Kondo coupled to localized spins in the adjacent Mott insulating CrO${}_2$ layers. At high temperatures $T$ it has a $T$-linear resistivity which is not seen in the isostructural but non-magnetic PdCoO${}_2$. The strength of the Kondo coupling is known, as-grown crystals are extremely high purity and the Fermi surface is both very simple and experimentally known. It is therefore an ideal material platform in which to investigate 'Planckian metal' physics. We do this by means of controlled introduction of point disorder, measurement of the thermal conductivity and Lorenz ratio and studying the sources of its high temperature entropy. The $T$-linear resistivity is seen to be due mainly to elastic scattering and to arise from a sum of several scattering mechanisms. Remarkably, this sum leads to a scattering rate within 10$\%$ of the Planckian value of $k_{B}T/$$\hslash$.

References in corpus (30)

• Strange metal in magic-angle graphene with near Planckian dissipation
• Powerlaw optical conductivity with a constant phase angle in high Tc superconductors
• Quantum Criticality in Twisted Transition Metal Dichalcogenides
• Universal $T$-linear resistivity and Planckian limit in overdoped cuprates
• Line nodes in the energy gap of high-temperature superconducting BaFe_2(As_{1-x}P_x)_2 from penetration depth and thermal conductivity measurements
• The properties of ultrapure delafossite metals
• Quantum critical behavior in magic-angle twisted bilayer graphene
• Planckian Dissipation in Metals
• Maximal Rashba-like spin splitting via kinetic energy-driven inversion symmetry breaking
• Continuous Evolution of the Fermi Surface of CeRu2Si2 across the Metamagnetic Transition
• Critical behavior of the metallic triangular-lattice Heisenberg antiferromagnet PdCrO2
• Unconventional aspects of electronic transport in delafossite oxides
• Universal Tc depression by irradiation defects in underdoped and overdoped cuprates
• Linear-in-T resistivity in dilute metals: A Fermi liquid perspective
• Reconciling scaling of the optical conductivity of cuprate superconductors with Planckian resistivity and specific heat
• Superconductivity in an extreme strange metal
• Quantum Oscillations of the Metallic Triangular-lattice Antiferromagnet PdCrO2
• Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2
• Electronic Structure of the Metallic Antiferromagnet PdCrO${}_2$ Measured by Angle-Resolved Photoemission Spectroscopy
• From basic properties to the Mott design of correlated delafossites
• Anomalous Magnetothermopower in a Metallic Frustrated Antiferromagnet
• Linear-T scattering and pairing from antiferromagnetic fluctuations in the (TMTSF)_2X organic superconductors
• A stability bound on the $T$-linear resistivity of conventional metals
• Impact of short-range order on transport properties of the two-dimensional metal PdCrO${}_2$
• Planckian properties of 2D semiconductor systems
• Characterization of two electronic subsystems in cuprates through optical conductivity
• Investigation of Planckian behavior in a high-conductivity oxide: PdCrO${}_2$
• Controlled introduction of defects to delafossite metals by electron irradiation
• Intermediate-scale theory for electrons coupled to frustrated local-moments
• $T-$linear resistivity from magneto-elastic scattering: application to PdCrO${}_2$

Cited by in corpus (3)

• Stripe magnetic order and field-induced quantum criticality in the perfect triangular-lattice antiferromagnet CsCeSe${}_2$
• Investigation of Planckian behavior in a high-conductivity oxide: PdCrO${}_2$
• $T-$linear resistivity from magneto-elastic scattering: application to PdCrO${}_2$