Multiorbital Interactions and Spin Polarization in Single Rare-Earth Adatoms

Massine Kelai; Stefano Reale; Roberto Robles; Jaehyun Lee; Divya Jyoti; Philippe Ohresser; Edwige Otero; Fadi Choueikani; Fabrice Scheurer; Nicolás Lorente; Deung Jang Choi; Aparajita Singha; Fabio Donati

doi:10.1103/mkqz-p424

Multiorbital Interactions and Spin Polarization in Single Rare-Earth Adatoms

Massine Kelai, Stefano Reale, Roberto Robles, Jaehyun Lee, Divya Jyoti, Philippe Ohresser, Edwige Otero, Fadi Choueikani, Fabrice Scheurer, Nicolás Lorente, Deung Jang Choi, Aparajita Singha, Fabio Donati

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Surface-adsorbed rare-earth nanostructures are ideal platforms to investigate the interplay between intra-atomic interactions and multiorbital spin configurations. However, addressing these properties has posed severe experimental and theoretical challenges. Here, we use the orbital selectivity offered by x-ray absorption spectroscopy to quantify the Coulomb integrals of Nd atoms on conductive surfaces directly from experimental quantities, as well as the variation of individual orbital occupation upon cluster nucleation. Using x-ray magnetic circular dichroism we identify magnetic moments of the order of 0.1-0.2 μ_{B} at the 5d orbitals and their magnetic coupling with the 4f spins. Our results validate orbital-resolved x-ray spectroscopy as a reliable method for quantifying complex multiorbital interactions in surface-adsorbed lanthanides.

Original language	English
Pages (from-to)	106203
Number of pages	1
Journal	Physical Review Letters
Volume	135
Issue number	10
DOIs	https://doi.org/10.1103/mkqz-p424
State	Published - 5 Sep 2025

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title = "Multiorbital Interactions and Spin Polarization in Single Rare-Earth Adatoms",

abstract = "Surface-adsorbed rare-earth nanostructures are ideal platforms to investigate the interplay between intra-atomic interactions and multiorbital spin configurations. However, addressing these properties has posed severe experimental and theoretical challenges. Here, we use the orbital selectivity offered by x-ray absorption spectroscopy to quantify the Coulomb integrals of Nd atoms on conductive surfaces directly from experimental quantities, as well as the variation of individual orbital occupation upon cluster nucleation. Using x-ray magnetic circular dichroism we identify magnetic moments of the order of 0.1-0.2 μ\_\{B\} at the 5d orbitals and their magnetic coupling with the 4f spins. Our results validate orbital-resolved x-ray spectroscopy as a reliable method for quantifying complex multiorbital interactions in surface-adsorbed lanthanides.",

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T1 - Multiorbital Interactions and Spin Polarization in Single Rare-Earth Adatoms

AU - Kelai, Massine

AU - Reale, Stefano

AU - Robles, Roberto

AU - Lee, Jaehyun

AU - Jyoti, Divya

AU - Ohresser, Philippe

AU - Otero, Edwige

AU - Choueikani, Fadi

AU - Scheurer, Fabrice

AU - Lorente, Nicolás

AU - Choi, Deung Jang

AU - Singha, Aparajita

AU - Donati, Fabio

PY - 2025/9/5

Y1 - 2025/9/5

N2 - Surface-adsorbed rare-earth nanostructures are ideal platforms to investigate the interplay between intra-atomic interactions and multiorbital spin configurations. However, addressing these properties has posed severe experimental and theoretical challenges. Here, we use the orbital selectivity offered by x-ray absorption spectroscopy to quantify the Coulomb integrals of Nd atoms on conductive surfaces directly from experimental quantities, as well as the variation of individual orbital occupation upon cluster nucleation. Using x-ray magnetic circular dichroism we identify magnetic moments of the order of 0.1-0.2 μ_{B} at the 5d orbitals and their magnetic coupling with the 4f spins. Our results validate orbital-resolved x-ray spectroscopy as a reliable method for quantifying complex multiorbital interactions in surface-adsorbed lanthanides.

AB - Surface-adsorbed rare-earth nanostructures are ideal platforms to investigate the interplay between intra-atomic interactions and multiorbital spin configurations. However, addressing these properties has posed severe experimental and theoretical challenges. Here, we use the orbital selectivity offered by x-ray absorption spectroscopy to quantify the Coulomb integrals of Nd atoms on conductive surfaces directly from experimental quantities, as well as the variation of individual orbital occupation upon cluster nucleation. Using x-ray magnetic circular dichroism we identify magnetic moments of the order of 0.1-0.2 μ_{B} at the 5d orbitals and their magnetic coupling with the 4f spins. Our results validate orbital-resolved x-ray spectroscopy as a reliable method for quantifying complex multiorbital interactions in surface-adsorbed lanthanides.

UR - https://www.scopus.com/pages/publications/105016768278

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JO - Physical Review Letters

JF - Physical Review Letters

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Multiorbital Interactions and Spin Polarization in Single Rare-Earth Adatoms

Abstract

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