Edge States Versus Dilute Magnetism

3 Conductor-Insulator Transition Eq Opening and Surface Plasmonics 

The transition from conductor to insulator of noble metal clusters corresponded to the expansion of the Kubo gap Sk — 4Epl3N, where Ep corresponds to the Fermi energy of the bulk and N to the total number of atoms in the cluster. If the Sk is greater than the energy kT at room temperature (1/40 eV), electrons cannot 

The observed conduction band splitting provides possible mechanism for the surface plasma generation of nanoclusters of noble metals such as Ag and Au with oscillation frequency that is dependent upon the dielectric constant, Zl, charge density, n, and effective mass of electron, m, in the surface skin. The plasmonic frequency can be derived as cOp = oc eEG /n/m as the real part of the 

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