Local quantum phase transitions driven by Kondo correlations have been theoretically proposed in several magnetic nanosystems; however, clear experimental signatures are scant. Modeling a nickelocene molecule on a Cu(100) substrate as a two-orbital Anderson impurity with single-ion anisotropy coupled to two conduction bands, we find that recent scanning tunneling spectra reveal the existence of a topological quantum phase transition from the usual local Fermi liquid with high zero-bias conductance to a non-Landau Fermi liquid, characterized by a non-trivial quantized Luttinger integral, with a small conductance. The effects of intermediate valence, finite temperature, and structural relaxation of the molecule position allow us to explain the different observed behaviors.
Cited by 1
Blesio et al., Topological quantum phase transition in individual Fe atoms on
Phys. Rev. B 108, 045113 (2023) [Crossref]
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 Institut Jožef Stefan / Jožef Stefan Institute [IJS]
- 2 Univerza v Ljubljani / University of Ljubljana [UL]
- 3 Universidad Nacional de Rosario / National University of Rosario [UNR]
- 4 Centro Atómico Bariloche / Bariloche Atomic Centre