Orbital ordering and frustration of $p$-band Mott-insulators

Details Orbital ordering and frustration of $p$-band Mott-insulators Orbital ordering and frustration of $p$-band Mott-insulators

2008-01-06

arxiv.org/abs/0801.0888v4

Phys. Rev. Lett. 100, 200406 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

accepted by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.200406

We investigate the general structure of orbital exchange physics in Mott-insulating states of $p$-orbital systems in optical lattices. Orbital orders occur in both the triangular and Kagome lattices. In contrast, orbital exchange in the honeycomb lattice is frustrated as described by a novel quantum 120$^\circ$-model. Its classical ground states are mapped into configurations of the fully-packed loop model with an extra U(1) rotation degree of freedom. Quantum orbital fluctuations select a six-site plaquette ground state ordering pattern in the semiclassical limit from the ``order from disorder'' mechanism. This effect arises from the appearance of a zero energy flat-band of orbital excitations.

Affiliated with

Also associated with

No associations

Rating

Orbital ordering and frustration of $p$-band Mott-insulators 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 Orbital ordering and frustration of $p$-band Mott-insulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orbital ordering and frustration of $p$-band Mott-insulators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-653358