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arXiv · 2201.04106

Giant Valley-Polarized Spin Splittings in Magnetized Janus Pt Dichalcogenides

Shahid Sattar·J. Andreas Larsson·C. M. Canali·Stephan Roche·Jose H. Garcia
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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 novel 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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Shahid Sattar, J. Andreas Larsson, C. M. Canali, Stephan Roche, Jose H. Garcia. 2022-01-11. Giant Valley-Polarized Spin Splittings in Magnetized Janus Pt Dichalcogenides. https://doi.org/10.1103/physrevb.105.l041402

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