Tuning spinaron and Kondo resonances via quantum confinement

Controlling zero-bias anomalies in magnetic atoms provides a promising strategy to engineer tunable quantum many-body excitations. Here we show how two different quantum impurities featuring spinaron and Kondo excitations can be controlled via quantum confinement engineering by using circular quantum corrals on a Ag(111) surface. In corrals built from both Ag and Co adatoms, the width of the zero-bias anomaly in the central Co adatom oscillates as a function of corral radius with a period of half of the Ag(111) surface state wavelength. Parameters extracted for Co/Ag(111) show only small differences in the extracted spinaron zero-bias anomaly between corral walls built from Ag or Co adatoms. In quantum corrals occupied by metal-free phthalocyanine, a S=1/2 Kondo system, we observe notable changes in the zero-bias anomaly line shape as a function of corral radius. Our results offer insight into many-body Kondo and spinaron resonances in which the electronic density is controlled by confinement engineering.

Description

DOI

10.1103/PhysRevB.109.195415

Citation

Aapro, M, Kipnis, A, Lado, J L, Kezilebieke, S & Liljeroth, P 2024, ' Tuning spinaron and Kondo resonances via quantum confinement ', Physical Review B, vol. 109, no. 19, 195415, pp. 1-8 . https://doi.org/10.1103/PhysRevB.109.195415

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202405223498

Collections

[article-cris] Perustieteiden korkeakoulu / SCI

Show all metadata

Tuning spinaron and Kondo resonances via quantum confinement

Access rights

URL

Journal Title

Journal ISSN

Volume Title

Authors

Date

Department

Major/Subject

Mcode

Degree programme

Language

Pages

Series

Abstract

Description

Keywords

Other note

DOI

Citation

Permanent link to this item

Collections