Interlayer coupling of a two-dimensional kondo lattice with a ferromagnetic surface in the antiferromagnet CeCo2P2

doi:10.1021/acsnano.1c10705

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DOI Доступ к ресурсу на сайте издателя				10.1021/acsnano.1c10705

Title: Interlayer coupling of a two-dimensional kondo lattice with a ferromagnetic surface in the antiferromagnet CeCo2P2
Creator: Poelchen, Georg
Creator: Rusinov, Igor P.
Creator: Schulz, Susanne
Creator: Güttler, Monika
Creator: Mende, Max
Creator: Generalov, Alexander
Creator: Usachov, Dmitry Yu.
Creator: Danzenbächer, Steffen
Creator: Hellwig, Johannes
Creator: Peters, Marius
Creator: Kliemt, Kristin
Creator: Kucherenko, Yuri
Creator: Antonov, Victor N.
Creator: Laubschat, Clemens
Creator: Chulkov, Evgueni V.
Creator: Ernst, Arthur
Creator: Kummer, Kurt
Creator: Krellner, Cornelius
Creator: Vyalikh, Denis V.
Subject: фотоэмиссионная спектроскопия
тяжелые фермионы
Кондо двумерная решетка
антиферромагнитный порядок
двумерный ферромагнетизм
Date: 2022
DOI: 10.1021/acsnano.1c10705
Description: The f-driven temperature scales at the surfaces of strongly correlated materials have increasingly come into the focus of research efforts. Here, we unveil the emergence of a two-dimensional Ce Kondo lattice, which couples ferromagnetically to the ordered Co lattice below the P-terminated surface of the antiferromagnet CeCo2P2. In its bulk, Ce is passive and behaves tetravalently. However, because of symmetry breaking and an effective magnetic field caused by an uncompensated ferromagnetic Co layer, the Ce 4f states become partially occupied and spin-polarized near the surface. The momentum-resolved photoemission measurements indicate a strong admixture of the Ce 4f states to the itinerant bands near the Fermi level including surface states that are split by exchange interaction with Co. The temperature-dependent measurements reveal strong changes of the 4f intensity at the Fermi level in accordance with the Kondo scenario. Our findings show how rich and diverse the f-driven properties can be at the surface of materials without f-physics in the bulk. © 2022 American Chemical Society. All rights reserved.

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collection(s): Научное управление
Identifier: koha:000927570
https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000927570
Type: статьи в журналах
Source: ACS Nano. 2022. Vol. 16, № 3. P. 3573-3581
Language: eng

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Научное управление Interlayer coupling of a two-dimensional kondo lattice with a ferromagnetic surface in the antiferromagnet CeCo2P2