Nematic Ferromagnetism on the Lieb lattice

Details Nematic Ferromagnetism on the Lieb lattice Nematic Ferromagnetism on the Lieb lattice

2012-01-03

arxiv.org/abs/1201.0722v1

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures

Scientific paper

We discuss the properties of possible ferromagnetic orders on the Lieb lattice. We show that the presence of a quadratic-flat band crossing point (QFBCP) at half filling will dramatically affect the magnetic ordering. In the presence of a weak on-site repulsive interaction, we find the ground state is a nematic ferromagnetic order with simultaneously broken of time-reversal and rotational symmetries. When the interaction strength increases, the rotational symmetry will restore at some critical value, and the system enters a conventional ferromagnetic regime. We also point out that the spin gap in both the nematic and conventional ferromagnetic phases is of the order of interaction. This observation suggests that these magnetic orders can be realized and detected in cold atomic systems with present technology.

Affiliated with

Also associated with

No associations

Rating

Nematic Ferromagnetism on the Lieb lattice 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 Nematic Ferromagnetism on the Lieb lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nematic Ferromagnetism on the Lieb lattice will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-184349