Field-Free Spin-Orbit Torque Switching in Janus Chromium Dichalcogenides
Vojáček, Libor (Université Grenoble Alpes)
Medina Dueñas, Joaquin (Institut Català de Nanociència i Nanotecnologia)
Li, Jing (Université Grenoble Alpes)
Ibrahim, Fatima (Université Grenoble Alpes)
Manchon, Aurélien (Aix-Marseille Université)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Chshiev, Mairbek (Institut Universitaire de France)
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia)

Date:	2024
Abstract:	We predict a very large spin-orbit torque (SOT) capability of magnetic chromium-based transition-metal dichalcogenide (TMD) monolayers in their Janus forms CrXTe, with X = S, Se. The structural inversion symmetry breaking, inherent to Janus structures is responsible for a large SOT response generated by giant Rashba splitting, equivalent to that obtained by applying a transverse electric field of ∼100 V nm in non-Janus CrTe, completely out of experimental reach. By performing transport simulations on carefully derived Wannier tight-binding models, Janus systems are found to exhibit an SOT performance comparable to the most efficient two-dimensional materials, while additionally allowing for field-free perpendicular magnetization switching, due to their reduced in-plane symmetry. Altogether, our findings evidence that magnetic Janus TMDs stand as suitable candidates for ultimate SOT-MRAM devices in an ultracompact self-induced SOT scheme.
Grants:	Agencia Estatal de Investigación PID2022-138283NB-I00 Agencia Estatal de Investigación PCI2021-122035-2A European Commission 101078370 Agencia Estatal de Investigación PRE2021-097031 Agencia Estatal de Investigación CEX2021-001214-S European Commission 800945
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Spin-orbit torque ; Transition metal dichalcogenide ; 2D materials ; Van der Waals ferromagnet
Published in:	Nano letters, Vol. 24, Issue 38 (September 2024) , p. 11889-11894, ISSN 1530-6992

DOI: 10.1021/acs.nanolett.4c03029
PMID: 39267484

6 p, 3.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles