Quasiparticle approach to the transport in infinite-layer nickelates

Abstract

The normal-state transport properties of superconducting infinite-layer nickelates are investigated within an interacting three-orbital model. It includes effective Ni-$d_{z^2}$, Ni-$d_{x^2-y^2}$ bands as well as the self-doping band degree of freedom. Thermopower, Hall coefficient and optical conductivity are modelled within a quasiparticle approximation to the electronic states. Qualitative agreement in comparison to experimentally available Hall data is achieved, with notably a temperature-dependent sign change of the Hall coefficient for larger hole doping $x$. The Seebeck coefficient changes from negative to positive in a non-trivial way with $x$, but generally shows only modest temperature dependence. The optical conductivity shows a pronounced Drude response and a prominent peak structure at higher frequencies due to interband transitions. While the quasiparticle picture is surely approximative to low-valence nickelates, it provides enlightening insights into the multiorbital nature of these challenging systems.

7 pages, 3 figures

References in corpus (16)

• Self-doped Mott insulator for parent compounds of nickelate superconductors
• Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates
• Rotationally-invariant slave-boson formalism and momentum dependence of the quasiparticle weight
• Nickelate superconductors $--$ Multiorbital nature and spin freezing
• Optical properties of correlated materials -- Generalized Peierls approach and its application to VO2
• Orbital Selective Superconductivity in a Two-band Model of Infinite-Layer Nickelates
• Multiorbital processes rule the Nd${}_{1-x}$Sr${}_x$NiO${}_2$ normal state
• Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
• NMR Evidence of Antiferromagnetic Spin Fluctuations in Nd${}_{0.85}$Sr${}_{0.15}$NiO${}_2$
• Dynamical Mean Field Studies of Infinite Layer Nickelates: Physics Results and Methodological Implications
• Doping-dependent character and possible magnetic ordering of NdNiO${}_2$
• Correlated interface electron gas in infinite-layer nickelate versus cuprate films on SrTiO${}_3$(001)
• Emergent flat-band physics in $d^{9-\delta }$ multilayer nickelates
• Screening in a two-band model for superconducting infinite-layer nickelate
• Hall effect in doped Mott insulator: DMFT-approximation
• Stabilization of singlet hole-doped state in infinite-layer nickelate superconductors