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.
Keywords
Cite
@article{arxiv.2105.13248,
title = {Iron phthalocyanine on Au(111) is a "non-Landau" Fermi liquid},
author = {R. Žitko and G. G. Blesio and L. O. Manuel and A. A. Aligia},
journal= {arXiv preprint arXiv:2105.13248},
year = {2021}
}
Comments
11 pages, 7 figures + supplementary materials