Rare-Earth Metallic Chains on Silicon: Growth and Emergence of a Spin-Polarized 1D Channel

Integration of rare-earth (RE) metals into ultimately thin films gives rise to various fascinating effects, making them highly attractive for spintronics. While most of the research focuses on bulk phases and thick films, RE-based ultrathin films and 1D structures, in which quantum effects manifest in a more exotic manner, have not been sufficiently explored experimentally. We report on the epitaxial synthesis of the atomic-scale networks of nearly ideal 1D La and Ce chains. Using a number of experimental methods combined with first-principles calculations, we established a structural model and found that the chains have metallic character. The electronic spectrum of the Ce chain demonstrates giant magnetism-induced exchange splitting and the emergence of a spin-polarized 1D electron channel, which could allow the spin current regime to be achieved in the system. Since the fabricated atomic chains are seamlessly integrated with Si, they hold great potential for use in ultracompact spintronics.

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Publication Details

Journal
The Journal of Physical Chemistry C
Published
2025-10-22
DOI
https://doi.org/10.1021/acs.jpcc.5c06297
Primary Topic
Magnetic properties of thin films
Type
article
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article

Rare-Earth Metallic Chains on Silicon: Growth and Emergence of a Spin-Polarized 1D Channel

Nikita V. Denisov, Andrey V. Zotov, Alexander A. Saranin, Sergey V. Eremeev et al.
The Journal of Physical Chemistry C
Magnetic properties of thin films
article

Rare-Earth Metallic Chains on Silicon: Growth and Emergence of a Spin-Polarized 1D Channel

Nikita V. Denisov, Andrey V. Zotov, Alexander A. Saranin, Sergey V. Eremeev, Yuriy E. Vekovshinin, Tatiana V. Utas, Leonid V. Bondarenko, V.G. Kotlyar, A. Y. Tupchaya, Alexey N. Mihalyuk, Dimitry V. Gruznev, V. S. Zhdanov, P. V. Burkovskaya
article en

Abstract

Integration of rare-earth (RE) metals into ultimately thin films gives rise to various fascinating effects, making them highly attractive for spintronics. While most of the research focuses on bulk phases and thick films, RE-based ultrathin films and 1D structures, in which quantum effects manifest in a more exotic manner, have not been sufficiently explored experimentally. We report on the epitaxial synthesis of the atomic-scale networks of nearly ideal 1D La and Ce chains. Using a number of experimental methods combined with first-principles calculations, we established a structural model and found that the chains have metallic character. The electronic spectrum of the Ce chain demonstrates giant magnetism-induced exchange splitting and the emergence of a spin-polarized 1D electron channel, which could allow the spin current regime to be achieved in the system. Since the fabricated atomic chains are seamlessly integrated with Si, they hold great potential for use in ultracompact spintronics.

The Journal of Physical Chemistry CVol. 129(43)
Institute of Strength Physics and Materials Science (RU), Far Eastern Federal University (RU), Institute of Automation and Control Processes (RU), Advanced Materials and Technologies (Slovenia) (SI)
Openalex Percentile: Top 76%
Magnetic properties of thin films
DOISourceOpenAlex
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