Ultralong Spin Lifetime in Light Alkali Atom Doped Graphene

Overview

Journal ACS Nano

Publisher American Chemical Society

Specialty Biotechnology

Date 2020 Jun 3

PMID 32484657

Citations 2

Authors

B G Markus

P Szirmai

K F Edelthalhammer

P Eckerlein

A Hirsch

F Hauke

N M Nemes

Julio C Chacon-Torres

B Nafradi

L Forro

T Pichler

F Simon

Affiliations

Soon will be listed here.

Abstract

Today's great challenges of energy and informational technologies are addressed with a singular compound, Li- and Na-doped few-layer graphene. All that 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 line shape 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 a 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.

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