2008/01/24 by Yu. G. Semenov, Y. G. Semenov, Semenov, Y. G. +4
Engineering · Materials Science · Physics and Astronomy · #Advancements in Battery Materials #FOS: Physical sciences #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #Quantum and electron transport phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.0801.3829
9 pages, 4 figures
openalex publication_date 2008/01/24 · arxiv created 2008/04/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A drastic modification of electronic band structure is predicted in bilayer graphene when it is placed between two ferromagnetic insulators. Due to the exchange interaction with the proximate ferromagnet, the electronic energy dispersion in the graphene channel strongly depends on the magnetization orientation of two ferromagnetic layers, \mathbfM1 and \mathbfM2 . While the parallel configuration \mathbfM1= \mathbfM2 leads to simple spin splitting of both conduction and valence bands, an energy gap is induced as soon as the angle θ between \mathbfM1 and % \mathbfM2 becomes non-zero with the maximum achieved at θ=π (i.e., antiparallel alignment). Consequently, bilayer graphene may exhibit a sizable magnetoresistive effect in the current-in-plane configuration. A rough estimate suggests the resistance changes on the order of tens of percent at room temperature. This effect is expected to become more pronounced as the temperatures decreases.