Landau theory of charge and spin ordering in the nickelates

Details Landau theory of charge and spin ordering in the nickelates Landau theory of charge and spin ordering in the nickelates

2010-08-13

arxiv.org/abs/1008.2373v1

Phys. Rev. Lett. 106, 016405 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

Guided by experiment and band structure, we introduce and study a phenomenological Landau theory for the unusual charge and spin ordering associated with the Mott transition in the perovskite nickelates, with chemical formula RNiO$_3$, where R=Pr, Nd, Sm, Eu, Ho, Y, and Lu. While the Landau theory has general applicability, we show that for the most conducting materials, R=Pr, Nd, both types of order can be understood in terms of a nearly-nested spin density wave. Furthermore, we argue that in this regime, the charge ordering is reliant upon the orthorhombic symmetry of the sample, and therefore proportional to the magnitude of the orthorhombic distortion. The first order nature of the phase transitions is also explained. We briefly show by example how the theory is readily adapted to modified geometries such as nickelate films.

Affiliated with

Also associated with

No associations

Rating

Landau theory of charge and spin ordering in the nickelates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Landau theory of charge and spin ordering in the nickelates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Landau theory of charge and spin ordering in the nickelates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-503542