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Mapping Orbital-Resolved Magnetism in Single Lanthanide Atoms

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Title
Mapping Orbital-Resolved Magnetism in Single Lanthanide Atoms
Author(s)
Aparajita Singha; Daria Sostina; Christoph Wolf; Safa L. Ahmed; Denis Krylov; Luciano Colazzo; Gargiani, Pierluigi; Agrestini, Stefano; Noh, Woo-Suk; Park, Jae-Hoon; Pivetta, Marina; Rusponi, Stefano; Brune, Harald; Andreas J. Heinrich; Barla, Alessandro; Fabio Donati
Publication Date
2021-10-26
Journal
ACS Nano, v.15, no.10, pp.16162 - 16171
Publisher
American Chemical Society
Abstract
© Single lanthanide atoms and molecules are promising candidates for atomic data storage and quantum logic due to the long lifetime of their magnetic quantum states. Accessing and controlling these states through electrical transport requires precise knowledge of their electronic configuration at the level of individual atomic orbitals, especially of the outer shells involved in transport. However, no experimental techniques have so far shown the required sensitivity to probe single atoms with orbital selectivity. Here we resolve the magnetism of individual orbitals in Gd and Ho single atoms on MgO/Ag(100) by combining X-ray magnetic circular dichroism with multiplet calculations and density functional theory. In contrast to the usual assumption of bulk-like occupation of the different electronic shells, we establish a charge transfer mechanism leading to an unconventional singly ionized configuration. Our work identifies the role of the valence electrons in determining the quantum level structure and spin-dependent transport properties of lanthanide-based nanomagnets.
URI
https://pr.ibs.re.kr/handle/8788114/10649
DOI
10.1021/acsnano.1c05026
ISSN
1936-0851
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > 1. Journal Papers (저널논문)
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