Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide 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 –1 in non-Janus CrTe 2, 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.
Source: Nano Letters
Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Spintronique et Technologie des Composants, Université Grenoble Alpes, Universitat Autònoma de Barcelona, Consejo Superior de Investigaciones Científicas, Institut Català de Nanociència i Nanotecnologia, Laboratoire d'Électronique des Technologies de l'Information, Aix-Marseille Université, Centre Interdisciplinaire de Nanoscience de Marseille, Institució Catalana de Recerca i Estudis Avançats, Institut Universitaire de France
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Ministerio de Ciencia, Innovación y Universidades, European Commission, Generalitat de Catalunya, Grand Équipement National De Calcul Intensif, Horizon 2020 Framework Programme, European Research Council, European Regional Development Fund, Agencia Estatal de Investigación, H2020 Marie Skłodowska-Curie Actions
Awards: G1899499225, G2262748287, G2402982190, International PhD programme in NUMERICal Simulation, G2563643918, G3005324705, G3323197789, G3345895242, G3480869486, G3577078101, G3681454997, G4042783231, G425668148, G4664162164, G4856020735, G5706383408, G6718400284, International PhD programme in NUMERICal Simulation, G7084143925, G7169023097, G7329201713, G8008519398, G8381808700, G8512683158
OpenAlex ID: W4402516415