6 papers
Superconductivity with s and p-symmetries in an extended Hubbard model with correlated hopping
A. A. Aligia, E. Gagliano, Liliana Arrachea +1
We consider a generalized Hubbard model with on-site and nearest-neighbour repulsions U and V respectively, and nearest-neighbour hopping for spin up (down) which depends on the to…
Critical behavior of the S=3/2 antiferromagnetic Heisenberg chain
K. Hallberg, X. Q. G. Wang, P. Horsch +1
Using the density-matrix renormalization-group technique we study the long-wavelength properties of the spin S=3/2 nearest-neighbor Heisenberg chain. We obtain an accurate value fo…
Shadow band in the one-dimensional large Hubbard model
Karlo Penc, Karen Hallberg, Frederic Mila +1
We show that the factorized wave-function of Ogata and Shiba can be used to calculate the dependent spectral functions of the one-dimensional, infinite Hubbard model, and o…
Static and dynamical properties of a magnetic impurity in a strongly correlated electronic system
K. A. Hallberg, C. A. Balseiro
Using numerical techniques we study the zero temperature properties of a substitutional magnetic impurity in a one-dimensional correlated system described by the Hubbard model with…
Numerical renormalization group study of the correlation functions of the antiferromagnetic spin- Heisenberg chain
K. A. Hallberg, P. Horsch, G. Martinez
We use the density-matrix renormalization group technique developed by White \cite{white} to calculate the spin correlation functions for isotr…
Density matrix algorithm for the calculation of dynamical properties of low dimensional systems
Karen A. Hallberg
I extend the scope of the density matrix renormalization group technique developed by White to the calculation of dynamical correlation functions. As an application and performance…