Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO${}_2$

Abstract

We study the electronic structure of the Pd-terminated surface of the non-magnetic delafossite oxide metal PdCoO${}_2$. Combining angle-resolved photoemission spectroscopy and density-functional theory, we show how an electronic reconstruction driven by surface polarity mediates a Stoner-like magnetic instability towards itinerant surface ferromagnetism. Our results reveal how this leads to a rich multi-band surface electronic structure, and provide spectroscopic evidence for an intriguing sample-dependent coupling of the surface electrons to a bosonic mode which we attribute to electron-magnon interactions. Moreover, we find similar surface state dispersions in PdCrO${}_2$, suggesting surface ferromagnetism persists in this sister compound despite its bulk antiferromagnetic order.

6 pages, 5 figures

References in corpus (12)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Magnetic effects at the interface between nonmagnetic oxides
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• High Mobility in LaAlO3/SrTiO3 Heterostructures: Origin, Dimensionality and Perspectives
• Origin of charge density at LaAlO3-on-SrTiO3 hetero-interfaces; possibility of intrinsic doping
• High-temperature interface superconductivity between metallic and insulating cuprates
• The properties of ultrapure delafossite metals
• Maximal Rashba-like spin splitting via kinetic energy-driven inversion symmetry breaking
• Surface defects and conduction in polar oxide heterostructures
• A facility for the analysis of the electronic structures of solids and their surfaces by synchrotron radiation photoelectron spectroscopy
• Critical behavior of the metallic triangular-lattice Heisenberg antiferromagnet PdCrO2

Cited by in corpus (30)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Growth of metallic delafossite PdCoO2 by molecular beam epitaxy
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• From basic properties to the Mott design of correlated delafossites
• Anomalous Hall effect at the spontaneously electron-doped polar surface of PdCoO2 ultrathin films
• Quasiparticle interference and quantum confinement in a correlated Rashba spin-split 2D electron liquid
• Nonreciprocal transport in a Rashba ferromagnet, delafossite PdCoO${}_2$
• Tuneable electron-magnon coupling of ferromagnetic surface states in PdCoO${}_2$
• Metallic delafossite thin films for unique device applications
• Disentangling structural and electronic properties in V${}_2$O${}_3$ thin films: a genuine non-symmetry breaking Mott transition
• Flatband-Induced Itinerant Ferromagnetism in RbCo${}_2$Se${}_2$
• Determination of the phase coherence length of PdCoO${}_2$ nanostructures
• Ferromagnetic fluctuations in the Rashba-Hubbard model
• The Fermi surface of PtCoO2 from quantum oscillations and electronic structure calculations
• Avoided metallicity in a hole-doped Mott insulator on a triangular lattice
• Emergent magnetism with continuous control in the ultrahigh conductivity layered oxide PdCoO2
• Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect
• Fully two-dimensional incommensurate charge modulation on the Pd-terminated polar surface of PdCoO2
• Probing hidden Mott gap and incommensurate charge modulation on the polar surfaces of PdCrO${}_2$
• Theoretical design of highly correlated electron states in delafossite heterostructures
• Strong surface termination dependence of the electronic structure of polar superconductor LaFeAsO revealed by nano-ARPES
• Adsorbate-induced formation of a surface-polarity-driven nonperiodic superstructure
• Diffusion-assisted molecular beam epitaxy of CuCrO${}_2$ thin films
• Anomalous Hall effect in electrolytically reduced PdCoO${}_2$ thin films
• Dichotomy of electron-phonon interactions in the delafossite PdCoO${}_2$: From weak bulk to polaronic surface coupling
• Quantum-Confined Tunable Ferromagnetism on the Surface of a van der Waals Antiferromagnet NaCrTe2
• Looking Beyond the Surface with Angle-Resolved Photoemission Spectroscopy
• In situ modification of delafossite type PdCoO2 bulk single crystal for reversible hydrogen sorption and fast hydrogen evolution
• Measurements of electronic band structure in CeCoGe${}_3$ by angle-resolved photoemission spectroscopy
• Control of Impurity Phase Segregation in a PdCrO${}_2$/CuCrO${}_2$ Heterostructure