Kondo-attractive-Hubbard model for the ordering of local magnetic moments in superconductors
MetadataShow full item record
We consider local magnetic moments coupled to conduction electrons with on-site attraction in order to discuss the interplay between pairing and magnetic order. We probe the ground-state properties of this model on a one-dimensional lattice through pair binding energies and several correlation functions calculated by means of density-matrix renormalization group. A phase diagram is obtained (for fixed electron density 1/3) from which we infer that coexistence between magnetic order and superconductivity is robust at the expense of a continuous distortion of the magnetic arrangement of the local moments as evidenced by a strong dependence of the characteristic wave vector k(*) on the coupling constants. This allows us to understand some trends of the coexistence, such as the influence of the rare earth on k(*), as observed experimentally in the borocarbides.
How to cite this document
Showing items related by title, author, creator and subject.
Kassab, Luciana R. P. ; de Almeida, Ricardo; da Silva, Davinson M.; de Assumpcao, Thiago A. A.; de Araujo, Cid B. (Journal of Applied Physics, 2009) [Artigo]We report on energy transfer studies in terbium (Tb3+)-europium (Eu3+) doped TeO2-ZnO-Na2O-PbO glass containing silver nanostructures. The samples excitation was made using ultraviolet radiation at 355 nm. Luminescence ...
Juiz, S. A. ; Leles, M. I G ; Caires, A. C F ; Boralle, N. ; Ionashiro, Massao (Journal of Thermal Analysis, 1997) [Artigo]Solid M-Ox compounds, where M represents Mg(II), Zn(II), Pb(II) and NbO(III), and Ox is 8-quinolinol, have been prepared. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), ...
Solid-state compounds of 2-methoxybenzylidenepyruvate with some bivalent metal ions : SSSynthesis, characterization and thermal behavior studies Kobelnik, M. ; Schnitzler, E.; Ionashiro, Massao (Journal of Thermal Analysis and Calorimetry, 2008) [Artigo]Solid-state M-2-MeO-BP compounds, where M represents bivalent Mn, Fe, Co, Ni, Cu, Zn and 2-MeO-BP is 2-methoxybenzylidenepyruvate have been synthesized. Simultaneous thermogravimetry-differential thermal analysis (TG-DTA), ...