LETTER TO THE EDITOR: Quantum renormalization of high-energy excitations in the 2D Heisenberg model
LETTER TO THE EDITOR: Quantum renormalization of high-energy excitations in the 2D Heisenberg model
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DOI：
10.1088/0953-8984/12/25/104
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发表时间：
2000-06
期刊：
影响因子：
--
通讯作者：
O. Syljuåsen;H. Rønnow
中科院分区：
文献类型：
--
作者：
O. Syljuåsen;H. Rønnow
用Monte Carlo方法模拟自旋为1/2的二维正方晶格最近邻量子海森堡反铁磁体，发现（π，0）和（π/2，π/2）处的高能峰位置相差约6%，其中（π/2，π/2）处的峰位置最高.这是一个偏离线性自旋波理论，预测相等的磁振子能量在这些点。
We find using Monte Carlo simulations of the spin-1/2 2D square lattice nearest neighbour quantum Heisenberg antiferromagnet that the high-energy peak locations at (π, 0) and (π/2, π/2) differ by about 6%, (π/2, π/2) being the highest. This is a deviation from linear spin wave theory which predicts equal magnon energies at these points.