Large spin signal and spin rectification in folded-bilayer graphene
Journal article, 2026
Graphene is a promising platform for spin-based non-volatile memory, logic, and neuromorphic computing by combining long-distance spin transport with electrical tunability at room temperature. However, advancing beyond passive spin channels requires devices capable of generating large spin signals with efficient rectification capabilities, which are essential for active spintronic components. Here, we demonstrate a folded-bilayer graphene spin-valve device with giant non-local spin signals in the several mV range with pronounced spin-rectification effects. Efficient spin injection creates a significant spin accumulation of 20 meV and generates a spin diode effect with an asymmetry of over an order of magnitude between forward and reverse bias conditions. This spin-diode effect is expected to arise from nonlinear spin-charge interactions in the folded-bilayer graphene channel. These observed large spin signals and spin-diode effects in graphene systems offer a promising platform for developing active two-dimensional spintronic devices.
Author
Anamul Md Hoque
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Zoltan Kovacs-Krausz
MTA BME Correlated Waals Struct Momentum Res Grp
Budapest University of Technology and Economics
Bing Zhao
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Prasanna Rout
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Ivan Vera Marun
University of Manchester
Szabolcs Csonka
Momentum Superconducting Nanoelect Res Grp
Budapest University of Technology and Economics
Peter Makk
MTA BME Correlated Waals Struct Momentum Res Grp
Budapest University of Technology and Economics
Saroj Prasad Dash
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
npj 2D Materials and Applications
23977132 (eISSN)
Vol. 10 1 43Hybrid MEG-MRI Imaging System (MEGMRI)
European Commission (EC) (EC/FP7/200859), 2008-05-01 -- 2012-12-31.
European Commission (EC) (EC/FP7/200859), 2013-01-01 -- 2013-02-28.
Subject Categories (SSIF 2025)
Condensed Matter Physics
DOI
10.1038/s41699-026-00679-0