Unusual Hyperfine Interaction of Dirac Electrons and NMR Spectroscopy in Graphene
Unusual Hyperfine Interaction of Dirac Electrons and NMR Spectroscopy in Graphene
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DOI：
10.1103/physrevlett.102.197602
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发表时间：
2009-05-15
影响因子：
8.6
通讯作者：
Simon, Ferenc
中科院分区：
文献类型：
--
作者：
Dora, Balazs;Simon, Ferenc
提出了石墨烯的核磁共振理论。电子-核超精细相互作用的标准形被线性电子色散强烈地修正。计算了作为温度、化学势和磁场的函数的核磁共振位移和自旋晶格弛豫时间，发现了三个不同的区域：费米、狄拉克气体和极端量子极限行为。一项关键的光谱仪评估表明，核磁共振可以获得大小合理的全(13)C富集型石墨烯。
A 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 a 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 (13)C enriched graphene of reasonable size.