Electronic structure of V$_4$O$_7$: charge ordering, metal-insulator transition and magnetism

Details Electronic structure of V$_4$O$_7$: charge ordering, metal-insulator transition and magnetism Electronic structure of V$_4$O$_7$: charge ordering, metal-insulator transition and magnetism

2011-05-27

arxiv.org/abs/1105.5622v2

Phys. Rev. B 84, 115138 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 6 figures, 2 tables

Scientific paper

10.1103/PhysRevB.84.115138

The low and high-temperature phases of V$_4$O$_7$ have been studied by \textit{ab initio} calculations. At high temperature, all V atoms are electronically equivalent and the material is metallic. Charge and orbital ordering, associated with the distortions in the V pseudo-rutile chains, occur below the metal-insulator transition. Orbital ordering in the low-temperature phase, different in V$^{3+}$ and V$^{4+}$ chains, allows to explain the distortion pattern in the insulating phase of V$_4$O$_7$. The in-chain magnetic couplings in the low-temperature phase turn out to be antiferromagnetic, but very different in the various V$^{4+}$ and V$^{3+}$ bonds. The V$^{4+}$ dimers formed below the transition temperature form spin singlets, but V$^{3+}$ ions, despite dimerization, apparently participate in magnetic ordering.

Affiliated with

Also associated with

No associations

Rating

Electronic structure of V$_4$O$_7$: charge ordering, metal-insulator transition and magnetism 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 Electronic structure of V$_4$O$_7$: charge ordering, metal-insulator transition and magnetism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic structure of V$_4$O$_7$: charge ordering, metal-insulator transition and magnetism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-666282