91 citations · 292 across the 10 of their papers we have counts for
10 papers
The antiferromagnetic/paramagnetic transition in mixed-spin compounds R2BaNiO5
J. V. Alvarez, Roser Valenti
We present an extensive Quantum Monte Carlo study of the magnetic properties of the mixed-spin quantum systems R2BaNiO5 (R= magnetic rare earth) which show coexistence of 3-dimensi…
Conductivity of quantum-spin chains: A Quantum Monte Carlo approach
J. V. Alvarez, Claudius Gros
We discuss zero-frequency transport properties of various spin-1/2 chains. We show, that a careful analysis of Quantum Monte-Carlo (QMC) data on the imaginary axis allows to distin…
Properties of electrons near a Van Hove singularity
M. A. H. Vozmediano, J. Gonzalez, F. Guinea +2
The Fermi surface of most hole-doped cuprates is close to a Van Hove singularity at the M point. A two-dimensional electronic system, whose Fermi surface is close to a Van Hove sin…
Anomalous thermal conductivity of frustrated Heisenberg spin-chains and ladders
J. V. Alvarez, Claudius Gros
We study the thermal transport properties of several quantum spin chains and ladders. We find indications for a diverging thermal conductivity at finite temperatures for the models…
A microscopic model for a class of mixed-spin quantum antiferromagnets
J. V. Alvarez, Roser Valenti, A. Zheludev
We propose a microscopic model that describes the magnetic behavior of the mixed-spin quantum systems RBaNiO (R= magnetic rare earth). An evaluation of the properties of th…
Low-temperature transport in Heisenberg chains
J. V. Alvarez, Claudius Gros
A technique to determine accurately transport properties of integrable and non-integrable quantum-spin chains at finite temperatures by Quantum Monte-Carlo is presented. The reduct…
Fermi surface renormalization in Hubbard ladders
Kim Louis, J. V. Alvarez, Claudius Gros
We derive the one-loop renormalization equations for the shift in the Fermi-wavevectors for one-dimensional interacting models with four Fermi-points (two left and two right movers…
Modeling the electronic behavior of -LiV2O5: a microscopic study
R. Valenti, T. Saha-Dasgupta, J. V. Alvarez +2
We determine the electronic structure of the one-dimensional spin-1/2 Heisenberg compound -LiVO, which has two inequivalent vanadium ions, V(1) and V(2), via density-fun…
Can a frustrated spin-cluster model describe the low-temperature physics of NaV_2O_5 ?
Claudius Gros, Roser Valenti, J. V. Alvarez +2
Recent experimental evidence suggest the existence of three distinct V-valence states (V^{+4}, V^{+4.5} and V^{+5}) in the low-temperature phase of NaV_2O_5 in apparent discrepancy…
On the evaluation of the specific heat and general off-diagonal n-point correlation functions within the loop algorithm
J. V. Alvarez, Claudius Gros
We present an efficient way to compute diagonal and off-diagonal n-point correlation functions for quantum spin-systems within the loop algorithm. We show that the general rules fo…