Effect of contacts on spin lifetime measurements in graphene
arXiv:1404.3211 · doi:10.1103/PhysRevB.89.245436
Abstract
Injection, transmission, and detection of spins in a conducting channel are the basic ingredients of spintronic devices. Long spin lifetimes during transit are an important ingredient in realizing this technology. An attractive platform for this purpose is graphene, which has high mobilities and low spin-orbit coupling. Unfortunately, measured spin lifetimes are orders of magnitude smaller than theoretically expected. A source of spin loss is the resistance mismatch between the ferromagnetic electrodes and graphene. While this has been studied numerically, here we provide a closed form expression for Hanle spin precession which is the standard method of measuring spin lifetimes. This allows for a detailed characterization of the nonlocal spin valve device.
arXiv comment9 pages, 3 figures, published in Physical Review B
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Cited by in corpus (26)
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- The role of contact resistance in graphene field-effect devices
- Spin transport in graphene/transition metal dichalcogenide heterostructures
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- Electrical spin injection, transport, and detection in graphene-hexagonal boron nitride van der Waals heterostructures: progress and perspectives
- Strong and Tunable Spin Lifetime Anisotropy in Dual-Gated Bilayer Graphene
- Spin precession in anisotropic media
- Nanosecond spin relaxation times in single layer graphene spin valves with hexagonal boron nitride tunnel barriers
- Two-dimensional flexible high diffusive spin circuits
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