Frustrated superexchange interaction versus orbital order in a LaVO3 crystal

TitleFrustrated superexchange interaction versus orbital order in a LaVO3 crystal
Publication TypeJournal Article
Year of Publication2008
AuthorsZhou JS, Ren Y, Yan JQ, Mitchell JF, Goodenough JB
Journal TitlePhysical Review Letters
Volume100
Pages046401
Date PublishedFeb
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000252863400068
Keywordsfluctuations, TRANSITION-METAL COMPOUNDS
Abstract

Measurements of magnetic, transport properties, thermal conductivity, and magnetization under pressure as well as neutron diffraction have been made on a single crystal and powder sample of LaVO3. The Neel temperature was found to mark a transition from the phase with both frustrated superexchange interaction and spin-orbit lambda L.S coupling to the phase where the Jahn-Teller orbital-lattice coupling dominates. The dramatic reduction of absolute entropy in the paramagnetic phase is explained in terms of forming a long-range coherent state due to the interference between frustrated orbits and spins.

DOI10.1103/PhysRevLett.100.046401
Alternate JournalPhys. Rev. Lett.