Largely unquenched Re 5d orbital magnetic moments in half-metallic Ba2FeReO6 drive a symmetry lowering transition from a cubic paramagnet to a compressed tetragonal (c/a < 1) ferrimagnet below Tc ~ 305 K, with a giant linear magnetoelastic constant and the spins lying spontaneously along the unique tetragonal axis. The large orbital magnetization and degree of structural deformation indicate pr...

Using the self-consistent Born approximation we calculate Reiter’s wavefunction for a single hole introduced into the undoped and orbitally ordered ground state of the t–J model with t2g orbital degrees of freedom. While the number of excitations is similar to the spin t-J model for a given J/t, a distinct structure of the calculated wavefunction and its momentum dependence is identified sugges...

We study here the existence of solitary wave solutions of a generalized twocomponent Camassa-Holm system. In addition to those smooth solitary-wave solutions, we show that there are solitary waves with singularities: peaked and cusped solitary waves. We also demonstrate that all smooth solitary waves are orbitally stable in the energy space. We finally give a sufficient condition for global str...

We determine approximate eigenvalues and eigenfunctions shapes for bound states in the 3D shallow spherical ultrarelativistic well. Existence thresholds for the ground state and first excited states are identified, both in the purely radial and orbitally nontrivial cases. This contributes to an understanding of how energy may be stored or accumulated in the form of bound states of Schrödinger t...

We use lattice methods to evaluate from first principles the spectrum of hybrid mesons produced by gluonic excitations in quenched QCD with quark masses near the strange quark mass. For the spin-exotic mesons with J P C = 1 −+ , 0 +− , and 2 +− which are not present in the quark model, we determine the lightest state to be 1 −+ with mass of 2.0(2) GeV. Results obtained for orbitally excited mes...

In this paper we present some stability results for Hamiltonian PDE's which have an exact symmetry, and are perturbations of a linear resonant system. We also give an application to the nonlinear Schrr odinger equation constructing innnitely many families of periodical orbits, one of which is orbitally stable, and innnitely many families of \approximatively invariant" 2-dimensional tori, which ...

We investigate the magnetic instabilities of the two-dimensional model of interacting eg electrons for hole doping away from two electrons per site in the mean-field approximation. In particular, we address the occurrence of orbitally polarized states due to the inequivalent orbitals, and their interplay with ferromagnetic and antiferromagnetic spin order. The role played by the Hund’s exchange...