Now showing items 1-4 of 4
Incommensurate spin-density-wave and metal-insulator transition in the one-dimensional periodic Anderson model
(Amer Physical Soc, 2011-08-15)
We have used the density-matrix renormalization group method to study the ground-state properties of the symmetric periodic Anderson model in one dimension. We have considered lattices with up to N-s = 50 sites, and electron ...
Triangular-lattice anisotropic dimerized Heisenberg antiferromagnet: Stability and excitations of the quantum paramagnetic phase
(Amer Physical Soc, 2012-03-26)
Motivated by experiments on nonmagnetic triangular-lattice Mott insulators, we study one candidate paramagnetic phase, namely the columnar dimer (or valence-bond) phase. We apply variants of the bond-operator theory to a ...
Influence of nearest-neighbor Coulomb interactions on the phase diagram of the ferromagnetic Kondo model
The influence of a nearest-neighbor Coulomb repulsion of strength V on the properties of the ferromagnetic Kondo model is analyzed using computational techniques. The Hamiltonian studied here is defined on a chain using ...
Localization of a dipolar Bose-Einstein condensate in a bichromatic optical lattice
(Iop Publishing Ltd, 2010-10-28)
By numerical simulation and variational analysis of the Gross-Pitaevskii equation we study the localization, with an exponential tail, of a dipolar Bose-Einstein condensate (DBEC) of Cr-52 atoms in a three-dimensional ...