Double stranded antiferromagnetic helix as an efficient spin filter
Abstract
We report a large degree of spin filtration in a double stranded (ds) antiferromagnetic helix (AFH) system. Generally spin channel separation is not possible when a magnetic system possesses a vanishing net magnetiza-tion. But we show that a highly polarized spin current can be obtained through the ds AFH when it is subjected to a transverse electric field. Describing the physical system within a tight-binding framework, spin-dependent transport phenomena are studied using the well known Green's function formalism. The effects of chirality (left-handed and right-handed), electric field, electronic hopping (short-range and long-range) in each strand, system temperature, and size of the helix on spin filtration are critically investigated. Two different configurations of magnetic moments in the helix are taken into account, for a more general description. Suitably adjusting the physical parameters, almost cent percent spin polarization can be substantiated and that feature persists even for a broad parameter range. Our analysis may open up a new direction for achieving spin-selective electron transmission and designing of controlled spintronic devices using similar kinds of fascinating helical magnetic systems.
Más información
Título según WOS: | ID WOS:001072508200001 Not found in local WOS DB |
Título de la Revista: | RESULTS IN PHYSICS |
Volumen: | 52 |
Editorial: | Elsevier |
Fecha de publicación: | 2023 |
DOI: |
10.1016/j.rinp.2023.106918 |
Notas: | ISI |