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)

Fecha:	2022
Resumen:	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.
Ayudas:	European Commission 881603 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad MAT2016-75952-R
Nota:	Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Charge redistribution ; Dichalcogenides ; Europium oxide ; First-principles simulations ; Induced magnetism ; Polarization effect ; Polarized spins ; Spin splittings ; Spin textures ; Spin-polarization
Publicado en:	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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