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Competing Magnetic States in Silicene and Germanene 2D Ferromagnets Full article

Journal

NANO RESEARCH
ISSN: 1998-0124 , E-ISSN: 1998-0000

Output data

Year: 2020, Volume: 13, Number: 12, Pages: 3396-3402 Pages count : 7 DOI: 10.1007/s12274-020-3027-y

Tags

silicene, germanene, two-dimensional (2D) ferromagnetism, X-ray magnetic circular dichroism (XMCD), monolayer

Authors

Averyanov Dmitry V. ¹ , Sokolov Ivan S. ¹ , Platunov Mikhail S. ^2,3 , Wilhelm Fabrice ² , Rogalev Andrei ² , Gargiani Pierluigi ⁴ , Valvidares Manuel ⁴ , Jaouen Nicolas ⁵ , Parfenov Oleg E. ¹ , Taldenkov Alexander N. ¹ , Karateev Igor A. ¹ , Tokmachev Andrey M. ¹ , Storchak Vyacheslav G. ¹

Affiliations

1	National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow 123182, Russia
2	ESRF-The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France
3	Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 38, 660036 Krasnoyarsk, Russia
4	ALBA Synchrotron Light Source, Cerdanyola del Vallès, 08290 Barcelona, Spain
5	Synchrotron SOLEIL, L’Orme des Merisiers, Gyf-sur-Yvette 91192, France

Two-dimensional (2D) magnets have recently developed into a class of stoichiometric materials with prospective applications in ultra-compact spintronics and quantum computing. Their functionality is particularly rich when different magnetic orders are competing in the same material. Metalloxenes REX2 (RE = Eu, Gd; X = Si, Ge), silicene or germanene—heavy counterparts of graphene—coupled with a layer of rare-earth metals, evolve from three-dimensional (3D) antiferromagnets in multilayer structures to 2D ferromagnets in a few monolayers. This evolution, however, does not lead to fully saturated 2D ferromagnetism, pointing at a possibility of coexisting/ competing magnetic states. Here, REX2 magnetism is explored with element-selective X-ray magnetic circular dichroism (XMCD). The measurements are carried out for GdSi2, EuSi2, GdGe2, and EuGe2 of different thicknesses down to 1 monolayer employing K absorption edges of Si and Ge as well as M and L edges of the rare-earths. They access the magnetic state in REX2 and determine the seat of magnetism, orbital, and spin contributions to the magnetic moment. High-field measurements probe remnants of the bulk antiferromagnetism in 2D REX2. The results provide a new platform for studies of complex magnetic structures in 2D materials.

Averyanov D.V. , Sokolov I.S. , Platunov M.S. , Wilhelm F. , Rogalev A. , Gargiani P. , Valvidares M. , Jaouen N. , Parfenov O.E. , Taldenkov A.N. , Karateev I.A. , Tokmachev A.M. , Storchak V.G.
Competing Magnetic States in Silicene and Germanene 2D Ferromagnets
NANO RESEARCH. 2020. V.13. N12. P.3396-3402. DOI: 10.1007/s12274-020-3027-y WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Jun 16, 2020
Accepted:	Jul 31, 2020
Published online:	Sep 1, 2020
Published print:	Dec 1, 2020

Web of science:	WOS:000565209100001
Scopus:	2-s2.0-85090146809
Elibrary:	45319545
Chemical Abstracts:	2020:2018311
Chemical Abstracts (print):	173:930846
OpenAlex:	W3081819735

DB	Citing
Web of science	17
Scopus	22
OpenAlex	23