Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-10-14
Phys. Rev. B 84 (2011), 224428 (7pp)
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 6 figures
Scientific paper
10.1103/PhysRevB.84.224428
Starting with the sqrt{3} x sqrt{3} and the q=0 states as reference states we use the coupled cluster method to high orders of approximation to investigate the ground state of the Heisenberg antiferromagnet on the kagome lattice for spin quantum numbers s=1/2,1,3/2,2,5/2, and 3. Our data for the ground-state energy for s=1/2 are in good agreement with recent large-scale density-matrix renormalization group and exact diagonalization data. We find that the ground-state selection depends on the spin quantum number s. While for the extreme quantum case, s=1/2, the q=0 state is energetically favored by quantum fluctuations, for any s>1/2 the sqrt{3} x sqrt{3} state is selected. For both the sqrt{3} x sqrt{3} and the q=0 states the magnetic order is strongly suppressed by quantum fluctuations. Within our coupled cluster method we get vanishing values for the order parameter (sublattice magnetization) M for s=1/2 and s=1, but (small) nonzero values for M for s>1. Using the data for the ground-state energy and the order parameter for s=3/2,2,5/2, and 3 we also estimate the leading quantum corrections to the classical values.
Bishop Raymond F.
Farnell Damian J. J.
Götze O.
Li P. H. Y.
Richter Jadwiga
No associations
LandOfFree
The Heisenberg antiferromagnet on the kagome lattice with arbitrary spin: A high-order coupled cluster treatment 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 The Heisenberg antiferromagnet on the kagome lattice with arbitrary spin: A high-order coupled cluster treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Heisenberg antiferromagnet on the kagome lattice with arbitrary spin: A high-order coupled cluster treatment will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-523222