Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-03-26
Phys. Rev. B 82, 136401 (2010)
Physics
Condensed Matter
Strongly Correlated Electrons
TeXLive (Unix), 3 pages, 3 figures
Scientific paper
In a recent paper [Phys. Rev. {\bf B80}, 174403 (2009)] Kotov {\it et al.} studied the paramagnetic-to-antiferromagnetic transition in the $J$-$Q$ model. Their findings were claimed to be in "fairly good agreement" with previous quantum Monte-Carlo (QMC) results. In this Comment we show that the above claim is misleading and in reality their phase transition point is not only far from the corresponding QMC value but also lies in a region of parameter space not yet explored in the literature. We also show that their reference dimer state is unstable against formation of a plaquette condensate, which could in part explain the large fluctuations they found.
Dukelsky Jorge
Isaev L.
Ortiz Gerardo
No associations
LandOfFree
Comment on "Quantum phase transition in the four-spin exchange antiferromagnet" by V. N. Kotov, D.-X. Yao, A. H. Castro-Neto, and D. K. Campbell 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 Comment on "Quantum phase transition in the four-spin exchange antiferromagnet" by V. N. Kotov, D.-X. Yao, A. H. Castro-Neto, and D. K. Campbell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comment on "Quantum phase transition in the four-spin exchange antiferromagnet" by V. N. Kotov, D.-X. Yao, A. H. Castro-Neto, and D. K. Campbell will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-183109