Mapping Orbital-Resolved Magnetism in Single Lanthanide Atoms
- 주제(키워드) orbital resolved magnetism , lanthanide magnetism , single atoms , X-ray magnetic circular dichroism , charge transfer
- 주제(기타) Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Singha, Aparajita; Sostina, Daria; Wolf, Christoph; Ahmed, Safa L.; Krylov, Denis; Colazzo, Luciano; Heinrich, Andreas J.; Donati, Fabio] Ctr Quantum Nanosci, Inst Basic Sci IBS, Seoul 03760, South Korea; [Singha, Aparajita; Sostina, Daria; Wolf, Christoph; Krylov, Denis; Colazzo, Luciano] Ewha Womans Univ, Seoul 03760, South Korea; [Singha, Aparajita] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany; [Ahmed, Safa L.; Heinrich, Andreas J.; Donati, Fabio] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Gargiani, Pierluigi; Agrestini, Stefano] ALBA Synchrotron Light Source, Catalonia 08290, Spain; [Noh, Woo-Suk] Max Planck POSTECH, MPPC CPM, Pohang 37673, South Korea; [Park, Jae-Hoon] Pohang Univ Sci & Technol POSTECH, Dept Phys, Pohang 37673, South Korea; [Pivetta, Marina; Rusponi, Stefano; Brune, Harald] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland; [Barla, Alessandro] Consiglio Nazl Ric CNR, Ist Struttura Mat ISM, I-34149 Trieste, Italy
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000183796
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acsnano.1c05026
- PubMed https://pubmed.ncbi.nlm.nih.gov/34546038
초록/요약
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.
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