Layer controlled orbital selective Mott transition in monolayer nickelate

Abstract

Dimensionality and electronic correlations are crucial elements of many quantum material properties. An example is the change of the electronic structure accompanied by the loss of quasiparticles when a metal is reduced from three dimensions to a lower dimension, where the Coulomb interaction between carriers becomes poorly screened. Here, using angle-resolved photoemission spectroscopy (ARPES), we report an orbital-selective decoherence of spectral density in the perovskite nickelate LaNiO3 towards the monolayer limit. The spectral weight of the dz2 band vanishes much faster than that of the dx2-y2 band as the thickness of the LaNiO3 layer is decreased to a single unit cell, indicating a stronger correlation effect for the former upon dimensional confinement. Dynamical mean-field theory (DMFT) calculations show an orbital-selective Mott transition largely due to the localization of dz2 electrons along the c axis in the monolayer limit. This orbital-selective correlation effect underpins many macroscopic properties of nickelates, such as metal-to-insulator transition and superconductivity, where most theories are built upon a dx2-y2-dz2 two-band model.

References in corpus (37)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Continuous-time Monte Carlo methods for quantum impurity models
• Superconductivity near 80 Kelvin in single crystals of La3Ni2O7 under pressure
• TRIQS: A Toolbox for Research on Interacting Quantum Systems
• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Physics of ultrathin films and heterostructures of rare earth nickelates
• TRIQS/CTHYB: A Continuous-Time Quantum Monte Carlo Hybridization Expansion Solver for Quantum Impurity Problems
• Turning a nickelate Fermi surface into a cuprate-like one through heterostructuring
• Visualizing Exotic Orbital Texture in the Single-Layer Mott Insulator 1T-TaSe2
• TRIQS/DFTTools: A TRIQS application for ab initio calculations of correlated materials
• Possible high $T_c$ Superconductivity in La${}_3$Ni${}_2$O${}_7$ under High Pressure through Manifestation of a Nearly-Half-Filled Bilayer Hubbard Model
• Ambient-pressure superconductivity onset above 40 K in bilayer nickelate ultrathin films
• Nickelate superconductors $--$ Multiorbital nature and spin freezing
• Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3
• Non-Fermi Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott Systems
• Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattice
• Orbital control of noncollinear magnetic order in nickelate heterostructures
• Dynamical Mean Field Theory of Nickelate Superlattices
• Superconductivity from emerging magnetic moments
• Nature of the metal-insulator transition in few-unit-cell-thick LaNiO3 films
• Modifying the Electronic Orbitals of Nickelate Heterostructures Via Structural Distortions
• Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials
• Electronic orders in multi-orbital Hubbard models with lifted orbital degeneracy
• Non-Thermal Emergence of an Orbital-Selective Mott Phase in FeTe${}_{1-x}$Se${}_x$
• Correlation-Driven Electronic Reconstruction in FeTe${}_{1-x}$Se${}_x$
• Electronic structure of superconducting nickelates probed by resonant photoemission spectroscopy
• Orbital-selective Mott phase in multiorbital models for iron pnictides and chalcogenides
• Quantifying electronic correlation strength in a complex oxide: a combined DMFT and ARPES study of LaNiO${}_3$
• Sr${}_2$MoO${}_4$ and Sr${}_2$RuO${}_4$: Disentangling the Roles of Hund's and van Hove Physics
• Antiferromagnetic metal phase in an electron-doped rare-earth nickelate
• Two-dimensional type-II Dirac fermions in a LaAlO3/LaNiO3/LaAlO3 quantum well
• Experimental verification of orbital engineering at the atomic scale: charge transfer and symmetry breaking in nickelate heterostructures
• Synthesis of thin film infinite-layer nickelates by atomic hydrogen reduction: clarifying the role of the capping layer
• Orbital Selective Mott Transition Effects and Non-Trivial Topology of Iron Chalcogenide
• A laser-ARPES study of LaNiO3 thin films grown by sputter deposition
• Hund bands in spectra of multiorbital systems
• Strain tunable electronic ground states in two-dimensional iridate thin films