Shot Noise Probing of Magnetic Ordering in Zigzag Graphene Nanoribbons
arXiv:0810.0002 · doi:10.1103/PhysRevB.79.241401
Abstract
The nonequilibrium time-dependent fluctuations of charge current have recently emerged as a sensitive experimental tool to probe ballistic transport through evanescent wave functions introduced into clean wide and short graphene strips by the attached metallic electrodes. We demonstrate that such "pseudo-diffusive" shot noise can be substantially modified in zigzag graphene nanoribbon (ZGNR) due to the topology of its edges responsible for localized states that facilitate ferromagnetic ordering along the edge when Coulomb interaction is taken into account. Thus, the shot noise enhancement of unpolarized, and even more sensitively of spin-polarized, charge currents injected into ZGNR will act as an all-electrical and edge-sensitive probe of such low-dimensional magnetism.
5 pages, 3 color figures; references updated
References in corpus (17)
- Energy Gaps in Graphene Nanoribbons
- Half-Metallic Graphene Nanoribbons
- Quantum-limited shot noise in graphene
- Magnetic Correlations at Graphene Edges
- Spin currents in rough graphene nanoribbons: Universal fluctuations and spin injection
- Shot Noise in Ballistic Graphene
- Perfectly Conducting Channel and Universality Crossover in Disordered Nano-Graphene Ribbons
- Shot Noise in Graphene
- Conductivity and Fano factor in disordered graphene
- Effective contact model for transport through weakly-doped graphene
- Spatial distribution of local currents of massless Dirac fermions in quantum transport through graphene nanoribbons
- Electronic transport in normal-conductor/graphene/normal-conductor junctions and conditions for insulating behavior at a finite charge-carrier density
- Evanescent wave transport and shot noise in graphene: ballistic regime and effect of disorder
- I-V curve signatures of nonequilibrium-driven band gap collapse in magnetically ordered zigzag graphene nanoribbon two-terminal devices
- Shot Noise of Spin-Decohering Transport in Spin-Orbit Coupled Nanostructures
- What can we learn about the dynamics of transported spins by measuring shot noise in spin-orbit-coupled nanostructures?
- Shot noise in diffusive ferromagnetic metals