Ultralong spin lifetime in light alkali atom doped graphene

Abstract

Today's great challenges of energy and informational technologies are addressed with a singular compound, the Li and Na doped few layer graphene. All what is impossible for graphite (homogeneous and high level Na doping), and unstable for single layer graphene, works very well for this structure. The transformation of the Raman G line to a Fano lineshape and the emergence of strong, metallic-like electron spin resonance (ESR) modes, attest the high level of graphene doping in liquid ammonia for both kinds of alkali atoms. The spin-relaxation time in our materials, deduced from the ESR line-width, is 6-8 ns, which is comparable to the longest values found in spin-transport experiments on ultrahigh mobility graphene flakes. This could qualify our material as promising candidate in spintronics devices. On the other hand, the successful sodium doping, this being a highly abundant metal, could be an encouraging alternative to lithium batteries.

10 pages, 5 figures+ Supplementary Materials

References in corpus (8)

• Tunneling Spin Injection into Single Layer Graphene (Supplementary Information)
• Tunneling Spin Injection into Single Layer Graphene
• Controlling spin relaxation in hexagonal BN-encapsulated graphene with a transverse electric field
• Nanosecond spin lifetimes in single- and few-layer graphene-hBN heterostructures at room temperature
• Giant non-adiabatic effects in layer metals: Raman spectra of intercalated graphite explained
• Spin Relaxation in Single Layer Graphene with Tunable Mobility
• A broadband and high throughput single-monochromator Raman spectrometer; application for single-wall carbon nanotubes
• Radiation detection and energy conversion in nuclear reactor environments by hybrid photovoltaic perovskites