Electrical complex ac conductivity of the compound Li<Subscript>0.9</Subscript>[Ni<Subscript>1/3</Subscript>Mn<Subscript>1/3< /Subscript>Co<Subscript>1/3</Subscript>]O<Subscript>1.95</Subscript> has been studied in the frequency range 10 Hz–2 MHz and in the temperature range 93–373 K. It has been observed that the frequency dependence of the ac conductivity obeys a power law and the temperature...</subscript></subscript></subscript></subscript></subscript>

We present an exact real-space renormalization group (RSRG) scheme for the electronic Green’s functions of one-dimensional tight-binding systems having both nearest-neighbor and next-nearest-neighbor hopping integrals, and determine the electronic density of states for the quasiperiodic...