Graphene Spin Transistor
| dc.creator | Cho, Sungjae | |
| dc.creator | Chen, Yung-Fu | |
| dc.creator | Fuhrer, Michael S. | |
| dc.date | 2007-06-12 | |
| dc.date.accessioned | 2026-07-07T08:47:04Z | |
| dc.date.available | 2026-07-07T08:47:04Z | |
| dc.description | Graphitic nanostructures, e.g. carbon nanotubes (CNT) and graphene, have been proposed as ideal materials for spin conduction[1-7]; they have long electronic mean free paths[8] and small spin-orbit coupling[9], hence are expected to have very long spin-scattering times. In addition, spin injection and detection in graphene opens new opportunities to study exotic electronic states such as the quantum Hall[10,11] and quantum spin Hall[9] states, and spin-polarized edge states[12] in graphene ribbons. Here we perform the first non-local four-probe experiments[13] on graphene contacted by ferromagnetic Permalloy electrodes. We observe sharp switching and often sign-reversal of the non-local resistance at the coercive field of the electrodes, indicating definitively the presence of a spin current between injector and detector. The non-local resistance changes magnitude and sign quasi-periodically with back-gate voltage, and Fabry-Perot-like oscillations[6,14,15] are observed, consistent with quantum-coherent transport. The non-local resistance signal can be observed up to at least T = 300 K. | |
| dc.identifier | https://arxiv.org/abs/0706.1597 | |
| dc.identifier | http://arxiv.org/abs/0706.1597 | |
| dc.identifier | Applied Physics Letters 91, 123105 (2007) | |
| dc.identifier | doi:10.1063/1.2784934 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/143467 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Graphene Spin Transistor | |
| dc.type | text |