Reversible control of Dzyaloshinskii-Moriya interaction at the graphene/Co interface via hydrogen absorption
Using first-principles calculations, we investigate the impact of hydrogenation on the Dzyaloshinskii-Moriya interaction (DMI) at graphene/Co interface. We find that both the magnitude and chirality of DMI can be controlled via hydrogenation absorbed on graphene surface. Our analysis using density o...
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| Veröffentlicht in: | Physical review. B 2020-01, Vol.101 (1), p.1, Article 014406 |
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| creator | Yang, Baishun Cui, Qirui Liang, Jinghua Chshiev, Mairbek Yang, Hongxin |
| description | Using first-principles calculations, we investigate the impact of hydrogenation on the Dzyaloshinskii-Moriya interaction (DMI) at graphene/Co interface. We find that both the magnitude and chirality of DMI can be controlled via hydrogenation absorbed on graphene surface. Our analysis using density of states combined with first-order perturbation theory reveals that the spin splitting and the occupation of Co-d orbitals, especially the dxz and dz2 states, play a crucial role in defining the magnitude and the chirality of DMI. Moreover, we find that the DMI oscillates with a period of two atomic layers as a function of Co thickness what could be explained by analysis of out-of-plane of Co orbitals. Our work elucidates the underlying mechanisms of interfacial DMI origin and provides an alternative route of its control for spintronic applications. |
| doi_str_mv | 10.1103/PhysRevB.101.014406 |
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Our analysis using density of states combined with first-order perturbation theory reveals that the spin splitting and the occupation of Co-d orbitals, especially the dxz and dz2 states, play a crucial role in defining the magnitude and the chirality of DMI. Moreover, we find that the DMI oscillates with a period of two atomic layers as a function of Co thickness what could be explained by analysis of out-of-plane of Co orbitals. Our work elucidates the underlying mechanisms of interfacial DMI origin and provides an alternative route of its control for spintronic applications.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.101.014406</doi><orcidid>https://orcid.org/0000-0003-2627-0888</orcidid><orcidid>https://orcid.org/0000-0001-9232-7622</orcidid></addata></record> |
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| subjects | Chirality Condensed Matter First principles Graphene Hydrogen storage Hydrogenation Materials Science Orbitals Perturbation theory Physics |
| title | Reversible control of Dzyaloshinskii-Moriya interaction at the graphene/Co interface via hydrogen absorption |
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