Giant valley-polarized spin splittings in magnetized Janus Pt dichalcogenides
Sattar, Shahid (Linnaeus University. Department of Physics and Electrical Engineering)
Larsson, J. Andreas (Luleå University of Technology. Department of Engineering Sciences and Mathematics)
Canali, C.M. (Linnaeus University. Department of Physics and Electrical Engineering)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia)

Date:	2022
Abstract:	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.
Grants:	European Commission 881603 Ministerio de Economía y Competitividad SEV-2017-0706 Agencia Estatal de Investigación MAT2016-75952-R
Note:	Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya.
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Charge redistribution ; Dichalcogenides ; Europium oxide ; First-principles simulations ; Induced magnetism ; Polarization effect ; Polarized spins ; Spin splittings ; Spin textures ; Spin-polarization
Published in:	Physical review B, Vol. 105, issue 4 (Jan. 2022) , art. A100, ISSN 2469-9969

DOI: 10.1103/PhysRevB.105.L041402

Postprint 7 p, 1.1 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)
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Articles > Published articles