SPIN-WAVE EXPANSION OF THE GROUND-STATE ENERGY OF THE SQUARE-LATTICE HEISENBERG-ANTIFERROMAGNET

被引：6
|
作者：
GOCHEV, IG
机构：
[1] Georgy Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.47.1096
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A spin-wave expansion is used to compute the ground-state energy of the square-lattice Heisenberg antiferromagnet to order 1/s. It is found that the ground-state energy per bond, E0, is given by E0=-s2-0.157 947s-0.006 237s0+0.000 107s-1+O(s-2). For s=1/2, this expression gives the value E0=-0.3350, which is in good agreement with the more precise Green's-function Monte Carlo and series-expansion estimates of the ground-state energy.
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页码：1096 / 1098
页数：3
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