ar X iv : c on d - m at / 9 30 50 30 v 1 2 5 M ay 1 99 3 Annihilation of Immobile Reactants on the Bethe Lattice

ar X iv : c on d - m at / 9 50 50 09 v 2 5 M ay 1 99 5 Magnetic Transition Temperature of ( La , Sr ) MnO 3

Using the Kondo lattice model with classical spins in infinite dimension, magnetic phase transition in the perovskite-type 3d transition-metal oxide La1−xSrxMnO3 is theoretically studied. On the Bethe lattice, the self-consistency equations are solved exactly. Curie temperatures at the region of double-exchange ferromagnetism 0.1 <∼ x <∼ 0.25 as well as the Nèel temperature at x = 0 are well re...

ar X iv : c on d - m at / 9 50 51 17 v 1 2 5 M ay 1 99 5 Temperature Dependence of the Conductivity in ( La , Sr ) MnO 3

Using the Kondo lattice model with classical spins in infinite dimension, conductivity in the perovskite-type 3d transition-metal oxide (La,Sr)MnO3 is theoretically studied. Green’s functions as well as spontaneous magnetization are obtained exactly on the Bethe lattice as a function of temperature. Conductivity is calculated from the Kubo formula. Below the Curie temperature, resistivity as a ...

ar X iv : c on d - m at / 9 30 50 01 v 1 3 M ay 1 99 3 One - dimensional asymmetrically coupled maps with defects

ar X iv : p at t - so l / 9 90 50 05 v 1 2 1 M ay 1 99 9 Discrete breathers in systems with homogeneous potentials - analytic solutions

We construct lattice Hamiltonians with homogeneous interaction potentials which allow for explicit breather solutions. Especially we obtain exponentially localized solutions for d-dimensional lattices with d = 2, 3.

ar X iv : h ep - p h / 99 05 46 9 v 1 2 5 M ay 1 99 9 DESY 99 – 060 hep - ph / 9905469 May 1999 W Boson Production at NLO ∗

We discuss W boson production at HERA including NLO QCD corrections. A detailed comparison with previous work is presented.