Unusual hyperfine interaction of Dirac electrons and NMR spectroscopy in graphene
arXiv:0904.0116 · doi:10.1103/PhysRevLett.102.197602
Abstract
Theory of nuclear magnetic resonance (NMR) in graphene is presented. The canonical form of the electron-nucleus hyperfine interaction is strongly modified by the linear electronic dispersion. The NMR shift and spin-lattice relaxation time are calculated as function of temperature, chemical potential, and magnetic field and three distinct regimes are identified: Fermi-, Dirac-gas, and extreme quantum limit behaviors. A critical spectrometer assessment shows that NMR is within reach for fully 13C enriched graphene of reasonable size.
5 pages, 3 figures