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Mapping Orbital-Resolved Magnetism in Single Lanthanide Atoms

Title
Mapping Orbital-Resolved Magnetism in Single Lanthanide Atoms
Authors
Singha, AparajitaSostina, DariaWolf, ChristophAhmed, Safa L.Krylov, DenisColazzo, LucianoGargiani, PierluigiAgrestini, StefanoNoh, Woo-SukPark, Jae-HoonPivetta, MarinaRusponi, StefanoBrune, HaraldHeinrich, Andreas J.Barla, AlessandroDonati, Fabio
Ewha Authors
Andreas HeinrichFabio DonatiWolf ChristophLuciano Colazzo
SCOPUS Author ID
Andreas Heinrichscopus; Fabio Donatiscopus; Wolf Christophscopus; Luciano Colazzoscopus
Issue Date
2021
Journal Title
ACS NANO
ISSN
1936-0851JCR Link

1936-086XJCR Link
Citation
ACS NANO vol. 15, no. 10, pp. 16162 - 16171
Keywords
orbital resolved magnetismlanthanide magnetismsingle atomsX-ray magnetic circular dichroismcharge transfer
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS
Document Type
Article
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.
DOI
10.1021/acsnano.1c05026
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자연과학대학 > 물리학전공 > Journal papers
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