Volume 80, Number 3, November 2007
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||10 October 2007|
Orbital-quenchinginduced magnetism in Ba2NaOsO6
Department of Physics, University of California - Davis, CA 95616, USA
Accepted: 11 September 2007
The double perovskite Ba2NaOsO6 with heptavalent Os (d1) is observed to remain in the ideal cubic structure (i.e. without orbital ordering) despite single occupation of the orbitals, even in the ferromagnetically ordered phase below 6.8 K. Analysis based on the ab initio dispersion expressed in terms of an Os -based Wannier function picture, spin-orbit coupling, Hund's coupling, and strong Coulomb repulsion shows that the magnetic OsO6 cluster is near a momentless condition due to spin and orbital compensation. Quenching (hybridization) then drives the emergence of the small moment. This compensation, unprecedented in transition metals, arises in a unified picture that accounts for the observed Mott insulating behavior.
PACS: 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect / 71.27.+a – Strongly correlated electron systems; heavy fermions / 77.84.Bw – Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.