342 citations · 1.2k across the 33 of their papers we have counts for
4 papers · 1 filter
New Type of Charge and Magnetic order in the Ferromagnetic Kondo Lattice
D. J. Garcia, K. Hallberg, C. D. Batista +2
We study numerically the one dimensional ferromagnetic Kondo lattice, a model widely used to describe nickel and manganese perovskites. By including a nearest neighbor Coulomb inte…
Density Matrix Renormalization
Karen Hallberg
The Density Matrix Renormalization Group (DMRG) has become a powerful numerical method that can be applied to low-dimensional strongly correlated fermionic and bosonic systems. It…
Superconductivity and Topological Numbers in the Hubbard Chain with Bond-Charge Interaction
A. A. Aligia, K. Hallberg, C. D. Batista +1
We determine the quantum phase diagram of the Hubbard chain with electron-hole symmetric correlated hopping at 1/2- and 1/4-filling using geometric concepts and continuum limit fie…
Electron Spin Resonance of defects in the Haldane System Y(2)BaNiO(5)
C. D. Batista, K. Hallberg, A. A. Aligia
We calculate the electron paramagnetic resonance (EPR) spectra of the antiferromagnetic spin-1 chain compound Y(2)BaNi(1-x)Mg(x)O(5) for different values of x and temperature T muc…