Quantum spin correlations in an organometallic alternating-sign chain

TitleQuantum spin correlations in an organometallic alternating-sign chain
Publication TypeJournal Article
Year of Publication2007
AuthorsStone MB, Tian W, Lumsden MD, Granroth GE, Mandrus D, Chung JH, Harrison N, Nagler SE
Journal TitlePhysical Review Letters
Volume99
Pages087204
Date PublishedAug
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000248984900047
Keywords(CH3)(2)NH2CUCL3, crystal-structure, EXCITATION SPECTRUM, HEISENBERG CHAIN, LADDERS, magnetic-properties, ONE-DIMENSIONAL SYSTEMS, phase, TETRAMETHYLAMMONIUM TRICHLORONICKELATE II, transition
Abstract

High resolution neutron scattering is used to study excitations in the organometallic magnet (CH3)(2)NH2CuCl3 (DMACuCl(3)). Combined with bulk magnetization and susceptibility studies, the new results imply that DMACuCl(3) is a realization of the S=1/2 alternating antiferromagnetic-ferromagnetic (AFM-FM) chain. Coupled-cluster calculations indicate that the AFM and FM interactions have nearly the same strength, while analysis of scattering intensities shows evidence for interdimer spin correlations. Results are discussed in the context of recent ideas concerning quantum entanglement.

DOI10.1103/PhysRevLett.99.087204
Alternate JournalPhys. Rev. Lett.