Bilayers of Chiral Spin States

Details Bilayers of Chiral Spin States Bilayers of Chiral Spin States

1995-02-10

arxiv.org/abs/cond-mat/9502044v3

Physics

Condensed Matter

to appear in Phys. Rev. B; shortened version; several typos corrected

Scientific paper

10.1103/PhysRevB.53.8708

We study the behavior of two planes of Quantum Heisenberg Antiferromagnet in the regime in which a Chiral Spin Liquid is stabilized in each plane. The planes are coupled by an exchange interaction of strength $J_3$. We show that in the regime of small $J_3$ (for both ferromagnetic {\it and} antiferromagnetic coupling), the system dynamically selects an \underline{antiferromagnetic} ordering of the ground state {\it chiralities} of the planes. For the case of an antiferromagnetic interaction between the planes, we find that, at some critical value $J_3^c$ of the inter-layer coupling, there is a phase transition to a valence-bond state on the interlayer links. We derive an effective Landau-Ginzburg theory for this phase transition. It contains two $U(1)$ gauge fields coupled to the order parameter field. We study the low energy spectrum of each phase. In the condensed phase an ``anti-Higgs-Anderson" mechanism occurs. It effectively restores time-reversal invariance by rendering massless one of the gauge fields while the other field locks the chiral degrees of freedom locally. There is no phase transition for ferromagnetic couplings.

Affiliated with

Also associated with

No associations

Rating

Bilayers of Chiral Spin States 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 Bilayers of Chiral Spin States, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bilayers of Chiral Spin States will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-384204