ar X iv : c on d - m at / 9 80 10 43 v 1 7 J an 1 99 8 Physical nature of all the electronic states in the Thue - Morse chain

ar X iv : c on d - m at / 9 80 60 43 v 1 3 J un 1 99 8 Electrodymanics with Toroid Polarization

A modified system of equations of electrodynamics has been obtained. Beside the Lagrangian one an alternative gauge-like formalism has been developed to introduce the toroid moment contributions in the equations obtained. The two potential formalism that was worked out by us earlier has been developed further where along with the two vector potentials we introduce two scalar potentials thus tak...

ar X iv : c on d - m at / 9 80 60 82 v 1 [ co nd - m at . m tr l - sc i ] 5 J un 1 99 8 Magnetic Particles

ar X iv : c on d - m at / 9 80 60 22 v 1 2 J un 1 99 8 Lattice Dimerization in the Spin - Peierls Compound CuGeO 3

The uniaxial pressure dependences of the exchange coupling and the structural distortion in the dimerized phase of CuGeO3 are analyzed. A minimum magnetic dimerization of 3 % is obtained, incompatible with an adiabatic approach to the spin–Peierls transition. Exploring the properties of an Heisenberg spin chain with dynamical spin-phonon coupling, the dimerization dependence of the spin excitat...

ar X iv : c on d - m at / 9 50 50 29 v 1 8 M ay 1 99 5 Electrons , pseudoparticles , and quasiparticles in one - dimensional interacting electronic systems

We find the singular transformation between the electron operator and the pseu-doparticle operators for the Hubbard chain. We generalize the concept of quasiparti-cle to one-dimensional electronic systems which in 1D refers to many-pseudoparticle objects. We obtain explicit results for the electron renormalization factor, self energy, and vertex functions at the Fermi points. We also discuss th...

ar X iv : c on d - m at / 9 51 20 72 v 1 1 1 D ec 1 99 5 DOMAIN WALLS IN THE SPIN - S QUANTUM ISING CHAIN

Recently, there has been a growing interest in the study of interfaces with nontrivial geometry. Such interfaces may arise for example in domain walls in random magnets, fluid invasion in porous media, spreading on heterogeneous surfaces, biological membranes and vesicles or epitaxial growth. When do quantum effects play a significant role in such problems ? For static properties in non-random ...