Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-07-04
Phys. Rev. B 69, 094418 (2004)
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 21 figures, final version
Scientific paper
10.1103/PhysRevB.69.094418
The phase diagram of a spin-1/2 $J-J'-J_2$ model is investigated by means of exact diagonalizations on finite samples. This model is a generalization of the $J_1-J_2$ model on the square lattice with two different nearest-neighbor couplings $J,J'$ and may be also viewed as an array of coupled Heisenberg chains. The results suggest that the resonnating valence bond state predicted by Nersesyan and Tsvelik [Phys. Rev. B {\bf 67}, 024422 (2003)] for $J_2=0.5J' \ll J$ is realized and extends beyond the limit of small interchain coupling along a curve nearly coincident with the line where the energy per spin is maximum. This line is likely bordered on both side by a columnar dimer long range order. This columnar order could extends for $J'\to J$ which correspond to the $J_1-J_2$ model.
No associations
LandOfFree
Spin-1/2 frustrated antiferromagnet on a spatially anisotopic square lattice: contribution of exact diagonalizations 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 Spin-1/2 frustrated antiferromagnet on a spatially anisotopic square lattice: contribution of exact diagonalizations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-1/2 frustrated antiferromagnet on a spatially anisotopic square lattice: contribution of exact diagonalizations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-513371