Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-12-02
Phys. Rev. Lett. 92, 157202 (2004)
Physics
Condensed Matter
Strongly Correlated Electrons
4 page, 4 figures
Scientific paper
10.1103/PhysRevLett.92.157202
We study the thermodynamics of the spin-$S$ two-dimensional quantum Heisenberg antiferromagnet on the square lattice with nearest ($J_1$) and next-nearest ($J_2$) neighbor couplings in its collinear phase ($J_2/J_1>0.5$), using the pure-quantum self-consistent harmonic approximation. Our results show the persistence of a finite-temperature Ising phase transition for every value of the spin, provided that the ratio $J_2/J_1$ is greater than a critical value corresponding to the onset of collinear long-range order at zero temperature. We also calculate the spin- and temperature-dependence of the collinear susceptibility and correlation length, and we discuss our results in light of the experiments on Li$_2$VOSiO$_4$ and related compounds.
Capriotti Luca
Fubini Andrea
Roscilde Tommaso
Tognetti Valerio
No associations
LandOfFree
Ising transition in the two-dimensional quantum $J_1-J_2$ Heisenberg model 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 Ising transition in the two-dimensional quantum $J_1-J_2$ Heisenberg model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ising transition in the two-dimensional quantum $J_1-J_2$ Heisenberg model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-687627