Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves
arXiv:1303.1899 · doi:10.7567/JJAP.52.040205
Abstract
The temperature dependence of the spin relaxation time in multilayer graphene (MLG) spin valve devices was measured using a non-local magnetoresistance (NLMR) measurement. A weak localization (WL) was observed from magnetoresistance (MR) measurements below 70 K, suggesting coherent transport of the charge carriers. Within the same temperature range, we observed a large increase in the spin relaxation time and spin diffusion length even though the diffusion constant Ds was suppressed by the WL. This demonstrated that the spin relaxation time in MLG could be significantly extended when the charge experiences quantum interference effect in the coherent charge transport regime.
10 pages, 2 figures, accepted to Jpn. J. Appl. Phys
References in corpus (17)
- Electronic spin transport and spin precession in single graphene layers at room temperature
- Quantum interference and Klein tunneling in graphene heterojunctions
- Weak localisation magnetoresistance and valley symmetry in graphene
- Weak localisation in graphene flakes
- Tunneling Spin Injection into Single Layer Graphene (Supplementary Information)
- Tunneling Spin Injection into Single Layer Graphene
- Towards wafer scale fabrication of graphene based spin valve devices
- Spin Injection into a Graphene Thin Film at Room Temperature
- Manipulation of Spin Transport in Graphene by Surface Chemical Doping
- Spin Transport and Relaxation in Graphene
- Electrical Detection of Spin Precession in Single Layer Graphene Spin Valves with Transparent Contacts
- Systematic Investigation of the Intrinsic Channel Properties and Contact Resistance of Monolayer and Multilayer Graphene FET
- Contact induced spin relaxation in Hanle spin precession measurements
- Comparison between charge and spin transport in few layer graphene
- Tunnel spin injection into graphene using Al2O3 barrier grown by atomic layer deposition on functionalized graphene surface
- Phase coherent transport in a side-gated mesoscopic graphite wire
- Slowing down of spin relaxation in two dimensional systems by quantum interference effects