Room-temperature anisotropic in-plane spin dynamics in graphene induced by PdSe$_2$ proximity
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866918130208473088 |
|---|---|
| author | Sierra, Juan F. Světlík, Josef Torres, Williams Savero Camosi, Lorenzo Herling, Franz Guillet, Thomas Xu, Kai Reparaz, Juan Sebastián Marinova, Vera Dimitrov, Dimitre Valenzuela, Sergio O. |
| author_facet | Sierra, Juan F. Světlík, Josef Torres, Williams Savero Camosi, Lorenzo Herling, Franz Guillet, Thomas Xu, Kai Reparaz, Juan Sebastián Marinova, Vera Dimitrov, Dimitre Valenzuela, Sergio O. |
| contents | Van der Waals heterostructures offer a versatile platform for tailoring electrical, magnetic, optical, and spin transport properties of materials through proximity effects. Notably, hexagonal transition metal dichalcogenides have been shown to induce valley-Zeeman spin-orbit coupling (SOC) in graphene, resulting in significant spin lifetime anisotropy between in-plane and out-of-plane spin orientations. However, in-plane lifetimes remain isotropic due to the inherent threefold symmetry of the heterostructure. Here, we demonstrate that pentagonal PdSe$_2$, characterised by unique in-plane anisotropy, induces an unprecedented gate-tunable SOC in graphene. Our measurements reveal a remarkable 10-fold modulation of the spin lifetime for spins oriented within the graphene plane at room temperature. Moreover, the directional dependence of the spin lifetimes, along the three spatial directions, suggests the existence of a persistent in-plane spin texture component that dominates the spin dynamics. These findings deepen our understanding of spin dynamics in van der Waals heterostructures and open avenues for designing and engineering novel topological phases in graphene-based heterostructures within the strong SOC regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_18002 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Room-temperature anisotropic in-plane spin dynamics in graphene induced by PdSe$_2$ proximity Sierra, Juan F. Světlík, Josef Torres, Williams Savero Camosi, Lorenzo Herling, Franz Guillet, Thomas Xu, Kai Reparaz, Juan Sebastián Marinova, Vera Dimitrov, Dimitre Valenzuela, Sergio O. Mesoscale and Nanoscale Physics Materials Science Van der Waals heterostructures offer a versatile platform for tailoring electrical, magnetic, optical, and spin transport properties of materials through proximity effects. Notably, hexagonal transition metal dichalcogenides have been shown to induce valley-Zeeman spin-orbit coupling (SOC) in graphene, resulting in significant spin lifetime anisotropy between in-plane and out-of-plane spin orientations. However, in-plane lifetimes remain isotropic due to the inherent threefold symmetry of the heterostructure. Here, we demonstrate that pentagonal PdSe$_2$, characterised by unique in-plane anisotropy, induces an unprecedented gate-tunable SOC in graphene. Our measurements reveal a remarkable 10-fold modulation of the spin lifetime for spins oriented within the graphene plane at room temperature. Moreover, the directional dependence of the spin lifetimes, along the three spatial directions, suggests the existence of a persistent in-plane spin texture component that dominates the spin dynamics. These findings deepen our understanding of spin dynamics in van der Waals heterostructures and open avenues for designing and engineering novel topological phases in graphene-based heterostructures within the strong SOC regime. |
| title | Room-temperature anisotropic in-plane spin dynamics in graphene induced by PdSe$_2$ proximity |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2508.18002 |