TY - JOUR
T1 - Large- N estimates of universal amplitudes of the C PN-1 theory and comparison with a S= 1 2 square-lattice model with competing four-spin interactions
AU - Kaul, Ribhu K.
AU - Melko, Roger G.
PY - 2008/7/15
Y1 - 2008/7/15
N2 - We present computations of certain finite-size scaling functions and universal amplitude ratios in the large- N limit of the C PN-1 field theory. We pay particular attention to the uniform susceptibility, the spin stiffness, and the specific heat. Field theoretic arguments have shown that the long-wavelength description of the phase transition between the Néel and valence-bond solid states in square lattice S=1/2 antiferromagnets is expected to be the noncompact C P1 field theory. We provide a detailed comparison between our field theoretic calculations and quantum Monte Carlo data close to the Néel-VBS transition on a S=1/2 square-lattice model with competing four-spin interactions (the JQ model).
AB - We present computations of certain finite-size scaling functions and universal amplitude ratios in the large- N limit of the C PN-1 field theory. We pay particular attention to the uniform susceptibility, the spin stiffness, and the specific heat. Field theoretic arguments have shown that the long-wavelength description of the phase transition between the Néel and valence-bond solid states in square lattice S=1/2 antiferromagnets is expected to be the noncompact C P1 field theory. We provide a detailed comparison between our field theoretic calculations and quantum Monte Carlo data close to the Néel-VBS transition on a S=1/2 square-lattice model with competing four-spin interactions (the JQ model).
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U2 - 10.1103/PhysRevB.78.014417
DO - 10.1103/PhysRevB.78.014417
M3 - Article
AN - SCOPUS:47949089097
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 1
M1 - 014417
ER -