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Giant valley-polarized spin splittings in magnetized Janus Pt dichalcogenides
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Linnaeus University, Linnaeus Knowledge Environments, Advanced Materials.ORCID iD: 0000-0003-4409-0100
LuleƄ University of Technology, Sweden.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Linnaeus University, Linnaeus Knowledge Environments, Advanced Materials.ORCID iD: 0000-0003-4489-7561
CSIC & BIST, Spain;ICREA, Spain.
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2022 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 105, no 4, article id L041402Article in journal, Letter (Refereed) Published
Abstract [en]

We reveal giant proximity-induced magnetism and valley-polarization effects in Janus Pt dichalcogenides (such as SPtSe), when bound to the europium oxide (EuO) substrate. Using first-principles simulations, it is surprisingly found that the charge redistribution, resulting from proximity with EuO, leads to the formation of two K and K' valleys in the conduction bands. Each of these valleys displays its own spin polarization and a specific spin texture dictated by broken inversion and time-reversal symmetries, and valley-exchange and Rashba splittings as large as hundreds of meV. This provides a platform for exploring spin-valley physics in low-dimensional semiconductors, with potential spin transport mechanisms such as spin-orbit torques much more resilient to disorder and temperature effects.

Place, publisher, year, edition, pages
American Physical Society, 2022. Vol. 105, no 4, article id L041402
National Category
Condensed Matter Physics
Research subject
Physics, Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-109890DOI: 10.1103/PhysRevB.105.L041402ISI: 000742858100001Scopus ID: 2-s2.0-85122643267Local ID: 2022OAI: oai:DiVA.org:lnu-109890DiVA, id: diva2:1632737
Available from: 2022-01-27 Created: 2022-01-27 Last updated: 2023-01-18Bibliographically approved

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Sattar, ShahidCanali, Carlo M.

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