Topological quantum phase transition of nickelocene on Cu(100)
Germán G. Blesio, Rok Žitko, Luis O. Manuel, Armando A. Aligia
SciPost Phys. 14, 042 (2023) · published 21 March 2023
- doi: 10.21468/SciPostPhys.14.3.042
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Abstract
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 3
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Germán G. Blesio,
- 1 2 Rok Žitko,
- 3 Luis O. Manuel,
- 4 Armando A. Aligia
- 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