91 citations · 292 across the 10 of their papers we have counts for
5 papers · 1 filter
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…