journal article·2021-10-26Open access

Mapping Orbital-Resolved Magnetism in Single Lanthanide Atoms

Aparajita Singha, Daria Sostina, Christoph Wolf, Safa L. Ahmed, Denis Krylov, Luciano Colazzo, Pierluigi Gargiani, Stefano Agrestini, Woo-Suk Noh, Jae-Hoon Park, Marina Pivetta, Stefano Rusponi, Harald Brune, Andreas J. Heinrich, Alessandro Barla, Fabio Donati

ACS Nano· Volume 15· Issue 10

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.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Magnetism in coordination complexes · Lanthanide and Transition Metal Complexes · Advanced NMR Techniques and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul 03760, Republic of Korea

Ewha Womans University, Seoul 03760, Republic of Korea

Max Planck Institute for Solid State Research, Stuttgart 70569, Germany

Department of Physics, Ewha Womans University, Seoul 03760, Republic of Korea

ALBA Synchrotron Light Source, Cerdanyola del Vallès, 08290 Catalonia, Spain

MPPC−CPM, Max Planck POSTECH/Korea Research Initiative, Pohang 37673, Republic of Korea

Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea

Institute of Physics, École Polytechnique Fédérale de Lausanne, Station 3, CH-1015 Lausanne, Switzerland

Istituto di Struttura della Materia (ISM), Consiglio Nazionale delle Ricerche (CNR), I-34149 Trieste, Italy

Funding

National Research Foundation of Korea · Institute for Basic Science

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