Topological quantum phase transition of nickelocene on Cu(100)

Autor:	Blesio, G. G., Žitko, R., Manuel, L. O., Aligia, A. A.
Rok vydání:	2022
Předmět:	Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
Popis:	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 easy-plane anisotropy coupled to two conduction bands, we find that recent scanning tunneling spectra measured at different microscope tip heights 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. Comment: 6 pages, 4 figures. Accepted in SciPost Physics
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2205.10476 Zobrazit plný text záznamu View this record from Arxiv