Moiré magnetism in CrBr3 multilayers emerging from differential strain

Article Article scientifique Article Moiré magnetism in CrBr3 multilayers emerging from differential strain eng 2024-11-29 author Yao Fengrui 0000-0003-3754-0628 Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. fengrui.yao@unige.ch.,Group of Applied Physics, University of Geneva, Geneva, Switzerland. fengrui.yao@unige.ch. 944537 Département de physique de la matière quantique (FIMAC) author Rossi Dario 0009-0004-6803-0940 Department of Theoretical Physics, University of Geneva, Geneva, Switzerland. 928470 Département de physique théorique (FITEO) author Gabrovski Ivo Antoniev Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. 413613 Département de physique de la matière quantique (FIMAC) author Multian Volodymyr 0000-0003-2553-9275 Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.,Group of Applied Physics, University of Geneva, Geneva, Switzerland.,Advanced Materials Nonlinear Optical Diagnostics lab, Institute of Physics, NAS of Ukraine, Kyiv, Ukraine. 977279 Serv com physique appliquée (FIGCO) author Hua Nelson 0000-0002-4642-3821 Laboratory for X-ray Nanoscience and Technologies, Paul Scherrer Institut, Villigen PSI, Switzerland. author Watanabe Kenji 0000-0003-3701-8119 Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Japan. author Taniguchi Takashi 0000-0002-1467-3105 Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan. author Gibertini Marco 0000-0003-3980-5319 Dipartimento di Scienze Fisiche, Informatiche e Matematiche, University of Modena and Reggio Emilia, Modena, Italy.,Centro S3, CNR-Istituto Nanoscienze, Modena, Italy. author Gutierrez Lezama Ignacio 0000-0003-1280-915X Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.,Group of Applied Physics, University of Geneva, Geneva, Switzerland. 681297 Département de physique de la matière quantique (FIMAC) author Rademaker Louk 0000-0001-6053-8150 Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. louk.rademaker@unige.ch. 906528 Département de physique de la matière quantique (FIMAC) author Morpurgo Alberto 0000-0003-0974-3620 Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. alberto.morpurgo@unige.ch.,Group of Applied Physics, University of Geneva, Geneva, Switzerland. alberto.morpurgo@unige.ch. 666794 Département de physique de la matière quantique (FIMAC) 10377 10.1038/s41467-024-54870-2 39613757 2041-1723 PMC11606980 https://www.nature.com/articles/s41467-024-54870-2 Interfaces between twisted 2D materials host a wealth of physical phenomena originating from the long-scale periodicity associated with the resulting moiré structure. Besides twisting, an alternative route to create structures with comparably long-or even longer-periodicities is inducing a differential strain between adjacent layers in a van der Waals (vdW) material. Despite recent theoretical efforts analyzing its benefits, this route has not yet been implemented experimentally. Here we report evidence for the simultaneous presence of ferromagnetic and antiferromagnetic regions in CrBr3 -a hallmark of moiré magnetism-from the observation of an unexpected magnetoconductance in CrBr3 tunnel barriers with ferromagnetic Fe3 GeTe2 and graphene electrodes. The observed magnetoconductance evolves with temperature and magnetic field as the magnetoconductance measured in small-angle CrBr3 twisted junctions, in which moiré magnetism occurs. Consistent with Raman measurements and theoretical modeling, we attribute the phenomenon to the presence of a differential strain in the CrBr3 multilayer, which locally modifies the stacking and the interlayer exchange between adjacent CrBr3 layers, resulting in spatially modulated spin textures. Our conclusions indicate that inducing differential strain in vdW multilayers is a viable strategy to create moiré-like superlattices, which in the future may offer in-situ continuous tunability even at low temperatures. Moiré materials Magnetotransport Magnetism Dewey 500.2 Swiss National Science Foundation Electronic Properties of 2D Materials and their Heterostructures 178891 CH Projects Swiss National Science Foundation Quantum Matter with a Twist - The Interplay of Correlations and Topology in Moiré Materials 211296 CH Programmes 33 Département de physique de la matière quantique 131 35 Groupe de physique appliquée 135 37 Département de physique théorique 133 false 1403 Groupe Rademaker 678 Groupe Morpurgo Nature communications 15 1 03877ba0-669c-41bb-96cd-9d07bb67b6ed Article (Published version) Public Article_scientifique_from_crossref.pdf 2019360 application/pdf CC BY-4.0 33d74a8a5b1b58253f66985b98d4c98965ff518b0be25a88b33c301f16773727 Vignette Public strain.jpg 467440 image/png openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique Faculté des sciences / Section de physique / Groupe de physique appliquée Faculté des sciences / Section de physique / Département de physique théorique

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