Thermodynamics of impurities in the anisotropic Heisenberg spin-1/2 chain

Simple item page
dc.creatorSirker, J.
dc.creatorFujimoto, S.
dc.creatorLaflorencie, N.
dc.creatorEggert, S.
dc.creatorAffleck, I.
dc.date2008-01-08
dc.date.accessioned2026-07-07T09:24:00Z
dc.date.available2026-07-07T09:24:00Z
dc.descriptionThe thermodynamics of finite open antiferromagnetic XXZ chains is studied using field theory, Bethe Ansatz and quantum Monte Carlo methods. For the susceptibility a parameter-free result as a function of the number of sites L and temperature T beyond the scaling limit is derived. The limiting cases T/J >> 1/L (J being the exchange constant), where the boundary correction shows a logarithmically suppressed Curie behaviour, and T/J << 1/L, where a crossover to the ground state behaviour takes place, are discussed in detail. Based on this analysis we present a simple formula for the averaged susceptibility of a spin-1/2 chain doped with non-magnetic impurities. We show that the effective Curie constant has a highly non-trivial temperature dependence and shows scaling in the low-temperature limit. Finally, corrections due to intra- and interchain couplings and implications for experiments on Sr_2 Cu_{1-x}Pd_x O_{3+δ} and related compounds are discussed.
dc.description30 pages, 11 figures
dc.identifierhttps://arxiv.org/abs/0801.1201
dc.identifierhttp://arxiv.org/abs/0801.1201
dc.identifierJ. Stat. Mech. (2008) P02015
dc.identifierdoi:10.1088/1742-5468/2008/02/P02015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155939
dc.subjectStrongly Correlated Electrons
dc.titleThermodynamics of impurities in the anisotropic Heisenberg spin-1/2 chain
dc.typetext

Files

Collections

arXiv