Journal
PHYSICAL REVIEW B
Volume 105, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.L041402
Keywords
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Funding
- Knut and Alice Wallenberg Foundation
- Kempestiftelserna
- Carl Tryggers Stiftelsen
- Swedish Research Council [2018-05973]
- King Abdullah University of Science and Technology (KAUST) from the Office of Sponsored Research (OSR) [OSR-2018-CRG73717]
- European Union Horizon 2020 research and innovation program [881603]
- CERCA Programme/Generalitat de Catalunya
- Severo Ochoa program from Spanish MINECO [SEV-2017-0706, MAT2016-75952-R]
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We demonstrate the presence of significant magnetism and valley polarization in Janus Pt dichalcogenides when bound to a EuO substrate. This proximity-induced effect leads to the formation of two valleys in the conduction bands, each with its own spin polarization and specific spin texture.
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.
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