| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil
[2] Univ San Ignacio Loyola, Grp Invest Fis, Av La Fontana 550, Lima 00012 - Peru
[3] Univ Privada Norte, Dept Ciencias, Av Andres Belaunde Cdra 10 S-N, Lima - Peru
[4] Univ Estadual Paulista, Inst Fis Teor, UNESP, Rua Dr Bento T Ferran 271, BR-01140070 Sao Paulo, SP - Brazil
Total Affiliations: 4
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| Document type: | Journal article |
| Source: | Physical Chemistry Chemical Physics; v. 21, n. 47, p. 26027-26032, DEC 21 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
The spin-dependent transport properties of armchair graphene nanoribbons in the presence of extrinsic spin-orbit coupling induced by a random distribution of nickel adatoms is studied. By combining a recursive Green's function formalism with density functional theory, we explore the influence of ribbon length and metal adatom concentration on the conductance. At a given length, we observed a significant enhancement of the spin-flip channel around resonances and at energies right above the Fermi level. We also estimate the spin-relaxation length, finding values on the order of tens of micrometers at low Ni adatom concentrations. This study is conducted at singular ribbon lengths entirely from fully ab initio methods, providing indirectly evidence that the Dyakonov-Perel spin relaxation mechanism might be the dominant at low concentrations as well as the observation of oscillations in the spin-polarization. (AU) | |
| FAPESP's process: | 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties |
| Grantee: | Adalberto Fazzio |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Special Projects |