121 citations · 350 across the 9 of their papers we have counts for
9 papers
Striped phase in a quantum XY-model with ring exchange
A. W. Sandvik, S. Daul, R. R. P. Singh +1
We present quantum Monte Carlo results for a square-lattice S=1/2 XY-model with a standard nearest-neighbor coupling J and a four-spin ring exchange term K. Increasing K/J, we find…
Full-CI Quantum Chemistry using the Density-Matrix Renormalization Group
S. Daul, I. Ciofini, C. Daul +1
We describe how density-matrix renormalization group (DMRG) can be used to solve the full-CI problem in quantum chemistry. As an illustration of the potential of this method, we ap…
Frustrated Hubbard ladders and superconductivity in -BEDT-TTF organic compounds
S. Daul, D. J. Scalapino
Half-filled two-leg Hubbard ladders have spin-gapped short-range antiferromagnetic correlations while three-leg ladders have power law antoferromagnetic correlations, and both syst…
First and second order ferromagnetic transition at T=0 in a 1D itinerant system
S. Daul
We consider a modified version of the one-dimensional Hubbard model, the t1-t2 Hubbard chain, which includes an additional next-nearest-neighbor hopping. It has been shown that at…
Effect of the W-term for a t-U-W Hubbard ladder
S. Daul, D. J. Scalapino, Steven R. White
Antiferromagnetic and d_{x2-y2}-pairing correlations appear delicately balanced in the 2D Hubbard model. Whether doping can tip the balance to pairing is unclear and models with ad…
Phase diagram of the half-filled Hubbard chain with next-nearest-neighbor hopping
S. Daul, R. M. Noack
We investigate the ground-state phase diagram of the half-filled one-dimensional Hubbard model with next-nearest-neighbor hopping using the Density-Matrix Renormalization Group tec…
Ferromagnetic transition and phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping
S. Daul, R. M. Noack
We study the phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping using exact diagonalization, the density-matrix renormalization group, the Edward…
DMRG study of ferromagnetism in a one-dimensional Hubbard model
S. Daul, R. Noack
The one dimensional Hubbard model with nearest and (negative) next-nearest neighbour hopping has been studied with the density-matrix renormalization group (DMRG) method. A large r…
Variationnal study of ferromagnetism in the t1-t2 Hubbard chain
S. Daul, P. Pieri, M. Dzierzawa +2
A one-dimensional Hubbard model with nearest and (negative) next-nearest neighbour hopping is studied variationally. This allows to exclude saturated ferromagnetism for .…