PTCDA molecular monolayer on Pb thin films: An unusual π-electron Kondo system and its interplay with a quantum-confined superconductor

Abstract

The hybridization of magnetism and superconductivity has been an intriguing playground for correlated electron systems, hosting various novel physical phenomena. Usually, localized d- or f-electrons are central to magnetism. In this study, by placing a PTCDA (3,4,9,10-perylene tetracarboxylic dianhydride) molecular monolayer on ultra-thin Pb films, we built a hybrid magnetism/superconductivity (M/SC) system consisting of only sp electronic levels. The magnetic moments reside in the unpaired molecular orbital originating from interfacial charge-transfers. We reported distinctive tunneling spectroscopic features of such a Kondo screened pi-electron impurity lattice on a superconductor in the regime of TK>>delta suggesting the formation of a two-dimensional bound states band. Moreover, moiré superlattices with tunable twist angle and the quantum confinement in the ultra-thin Pb films provide easy and flexible implementations to tune the interplay between the Kondo physics and the superconductivity, which are rarely present in M/SC hybrid systems.

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References in corpus (30)

• Topological insulators and superconductors
• Non-Abelian Anyons and Topological Quantum Computation
• Emergence of magnetism in graphene materials and nanostructures
• Spin qubits in graphene quantum dots
• Spin-half paramagnetism in graphene induced by point defects
• From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
• Magnetic Correlations at Graphene Edges
• Atomic-scale control of graphene magnetism using hydrogen atoms
• Topological superconductivity in a van der Waals heterostructure
• Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+d
• Topological Frustration in Graphene Nanoflakes: Magnetic Order and Spin Logic Devices
• Spectral Properties of Quasiparticle Excitations Induced by Magnetic Moments in Superconductors
• Long range coherent magnetic bound states in superconductors
• Single magnetic adsorbates on s-wave superconductors
• Atomic-Scale Interface Engineering of Majorana Edge Modes in a 2D Magnet-Superconductor Hybrid System
• Temperature and magnetic field dependence of a Kondo system in the weak coupling regime
• Superconductivity and Magnetism in a New Class of Heavy-Fermion Materials
• Coupled Yu-Shiba-Rusinov states in molecular dimers on NbSe${}_2$
• Two-dimensional Superconductors with Atomic-scale Thicknesses
• Molecular Assembly on Two-Dimensional Materials
• Visualizing landscapes of the superconducting gap in heterogeneous superconductor thin films: geometric influences on proximity effects
• Probing magnetic interactions between Cr adatoms on the $\beta$-Bi${}_2$Pd superconductor
• Microscopic interpretation of the Dynes formula for the tunneling density of states
• Proximity effect between two superconductors spatially resolved by scanning tunneling spectroscopy
• Scaling of Yu-Shiba-Rusinov energies in the weak-coupling Kondo regime
• Microscopic resolution of the interplay of Kondo screening and superconducting pairing: Mn-phthalocyanine molecules adsorbed on superconducting Pb(111)
• The Kondo Resonance Line Shape in Scanning Tunnelling Spectroscopy: Instrumental Aspects
• Edge magnetization and local density of states in chiral nanoribbons
• Interfering tunneling paths through magnetic molecules on superconductors: Asymmetries of Kondo and Yu-Shiba-Rusinov resonances
• Subgap states in disordered superconductors with strong magnetic impurities

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