We investigate the electronic instabilities of the small-diameter (3, 3) carbon nanotubes by studying the low-energy perturbations of the normal Luttinger liquid regime. The bosonization approach is adopted to deal exactly with the interactions in the forward-scattering channels, while...

By diagonalizing the 120×120 complete energy matrices for d<Superscript>3</Superscript> ion in trigonal crystal field, which contains the electrostatic interaction, the trigonal field as well as the spin-orbit interaction, the unified calculation of the whole optical and EPR spectra for ruby are made. And matrix elements...</superscript>

Theoretical analysis of the layered quasi-periodic Fibonacci structures (superlattices-sequence) is presented for the systems consisting of n<Subscript>A</Subscript> and n<Subscript>B</Subscript> ferromagnetically ordered planes within the layers with S<Subscript>a</Subscript> and S<Subscript>b</Subscript> spins, respectively, while the interfaces are coupled with bilinear and/or...</subscript></subscript></subscript></subscript>

The incommensurate composite systems M<Subscript>14</Subscript>Cu<Subscript>24</Subscript>O<Subscript>41</Subsc ript> (M=Ca, Sr, La) are based on two fundamental structural units: CuO<Subscript>2</Subscript> chains and Cu<Subscript>2</Subscript>O<Subscript>3</Subscript> ladders. We present electronic structure calculations within density functional theory in order to address the interrelations between chains and ladders. The...</subscript></subscript></subscript><//subsc></subscript></subscript></subscript>

The one-dimensional Kondo lattice model is investigated by means of Wegner's flow equation method. The renormalization procedure leads to an effective Hamiltonian which describes a free one-dimensional electron gas and a Heisenberg chain. The localised spins of the effective model are coupled by...

We discuss the Luttinger Liquid behaviour of Large Radius Carbon Nanotube e.g. the Multi Wall ones (MWNT), under the action of a transverse magnetic field B. Our results imply a reduction with B in the value of the bulk critical exponent, α<Subscript>bulk</Subscript>, for the tunneling density of states, which is...</subscript>

Using low-pressure chemical vapour deposition (LPCVD), multi-walled carbon nanotubes (MWNTs) are grown on nanocrystalline Fe<Subscript>70</Subscript>Pt<Subscript>30</Subscript> film. The Fe<Subscript>70</Subscript>Pt<Subscript>30</Subscript> nanocrystalline film is deposited by vapour condensation technique. The size of the nanoparticles varies from 5–10 nm, as inferred from SEM...</subscript></subscript></subscript></subscript>