Fracton excitations in a diluted Heisenberg antiferromagnet near the percolation threshold: RbMn0.39Mg0.61F3
Fracton excitations in a diluted Heisenberg antiferromagnet near the percolation threshold: RbMn0.39Mg0.61F3
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稀释的海森堡反铁磁体中接近渗滤阈值的分形子激发：RbMn0.39Mg0.61F3
DOI：
10.1088/0953-8984/6/48/015
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. Iwasa
中科院分区：
文献类型：
--
作者：
H. Ikeda;J. Fernandez;R. Nicklow;M. Takahashi;K. Iwasa
利用中子非弹性散射技术研究了c=0.39的稀释Heisenberg反铁磁体（rbmncm_1 - cf3）中接近cp=0.312渗透阈值的磁激发。没有迹象表明自旋波在整个布里渊区传播，但观察到一个宽峰叠加在伊辛团激发。这个宽峰的起源归因于渗流网络中分数的激发。
Using neutron inelastic scattering techniques we investigated the magnetic excitations in a diluted Heisenberg antiferromagnet (RbMncMg1-cF3 with c=0.39) close to the percolation threshold of cp=0.312. No indication of propagating spin waves was observed throughout the Brillouin zone, but a broad peak superimposed on Ising-cluster excitations was observed. The origin of this broad peak is attributed to the excitation of fractons in a percolating network.