Iron phthalocyanine on Au(111) is a "non-Landau" Fermi liquid

Abstract

The paradigm of Landau's Fermi liquid theory has been challenged with the finding of a strongly interacting Fermi liquid that cannot be adiabatically connected to a non-interacting system. A spin-1 two-channel Kondo impurity with anisotropy D has a quantum phase transition between two topologically different Fermi liquids with a peak (dip) in the Fermi level for D < Dc (D > Dc). Extending this theory to general multi-orbital problems with finite magnetic field, we reinterpret in a unified and consistent fashion several experimental studies of iron phthalocyanine molecules on Au(111) that were previously described in disconnected and conflicting ways. The differential conductance shows a zero-bias dip that widens when the molecule is lifted from the surface (reducing the Kondo couplings) and is transformed continuously into a peak under an applied magnetic field. We reproduce all features and propose an experiment to induce the topological transition.

11 pages, 7 figures + supplementary materials

References in corpus (20)

• The numerical renormalization group method for quantum impurity systems
• Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
• Observation of the two-channel Kondo effect
• Quantum phase transition in a single-molecule quantum dot
• Energy resolution and discretization artefacts in the numerical renormalization group
• Electronic and magnetic properties of molecule-metal interfaces: transition metal phthalocyanines adsorbed on Ag(100)
• A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
• Tuning the Kondo effect with a mechanically controllable break junction
• Nonequilibrium Singlet-Triplet Kondo Effect in Carbon Nanotubes
• Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
• Electronic excitations of a single molecule contacted in a three-terminal configuration
• Berry Phase Oscillations of the Kondo Effect in Single-Molecule Magnets
• Properties of anisotropic magnetic impurities on surfaces
• Correlated electron physics in multilevel quantum dots: phase transitions, transport, and experiment
• Many-particle effects in adsorbed magnetic atoms with easy-axis anisotropy: the case of Fe on CuN/Cu(100) surface
• Topological interpretation of Luttinger theorem
• Kondo resonance of a Co atom exchange coupled to a ferromagnetic tip
• Quantum Transport Through a Stretched Spin--1 Molecule
• Surface states influence in the conductance spectra of Co adsorbed on Cu(111)
• Many-body effects in porphyrin-like transition metal complexes embedded in graphene

Cited by in corpus (10)

• Connecting the Many-Body Chern Number to Luttinger's Theorem through Středa's Formula
• Topological invariants based on generalized position operators and application to the interacting Rice-Mele model
• Low-energy physics for an iron phthalocyanine molecule on Au(111)
• Topological quantum phase transition in individual Fe Atoms on MoS${}_2$/Au(111)
• Theoretical model for multi-orbital Kondo screening in strongly correlated molecules with several unpaired electrons
• Manipulation of the magnetic state of a porphyrin-based molecule on gold: From Kondo to quantum nanomagnet via the charge fluctuation regime
• The Weyl-Mott point: topological and non-Fermi liquid behavior from an isolated Green's function zero
• Quantum entanglement in a pure state of strongly correlated quantum impurity systems
• Topological charge excitations and Green's function zeros in paramagnetic Mott insulators
• Low-energy structure and topology of the two-band Hubbard-Kanamori model