The usefulness of electron spins in quantum information technologies such
as spintronics or quantum computation is determined by the spin-lattice (T1) and spinspin
(T2) relaxation times. These relaxation times should be long relative to the
characteristic times required for spin control in order to allow for controlled
information manipulation. Despite the central importance of T1 and T2 in modern
information technologies, direct experimental access to these quantities is scarce.
Electron spin resonance (ESR) spectroscopy is one of the few-experimental methods,
offering direct access to both T1 and T2 of electrons. In this chapter, we present recent
advancements in pulsed and continuous wave ESR spectroscopy of conducting carbon
nanomaterials that have emerged with the potential for practical applications.
Keywords: Conducting carbon materials, Conduction ESR (CESR), Disordered
onion-like carbon nanospheres (DOLCNS), Electron Spin Resonance (ESR), ESR
linewidth, ESR signal amplitude, g-shift, Graphene, High-field ESR, Pulsed ESR,
Rabi oscillations, Saturation methods, Skin depth, Spin dynamics, Spin-lattice
relaxation time, Spin lifetime, Spin relaxation process, Spin-spin relaxation time,
Spitronics, Synthetic graphene.
