Phys. Rev. B 72, 064102 (2005) [5 pages]Charge ordering and self-assembled nanostructures in a fcc Coulomb lattice gasReceived 4 March 2005; published 3 August 2005 The compositional ordering of Ag, Pb, Sb, Te ions in (AgSbTe2)x(PbTe)2(1−x) systems possessing a NaCl structure is studied using a Coulomb lattice gas (CLG) model on a face-centered cubic (fcc) lattice and Monte Carlo simulations. Our results show different possible microstructural orderings. Ordered superlattice structures formed out of AgSbTe2 layers separated by Pb2Te2 layers are observed for a large range of x values. For x=0.5, we see an array of tubular structures formed by AgSbTe2 and Pb2Te2 blocks. For x=1, AgSbTe2 has a body-centered tetragonal (bct) structure which is in agreement with previous Monte Carlo simulation results for restricted primitive model (RPM) at closed packed density. The phase diagram of this frustrated CLG system is discussed. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.72.064102
DOI:
10.1103/PhysRevB.72.064102
PACS:
64.60.Cn, 81.30.Bx, 81.16.Dn
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.