The anomalous Hall effect and magnetic monopoles in momentum space
The anomalous Hall effect and magnetic monopoles in momentum space
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DOI：
10.1126/science.1089408
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发表时间：
2003-10-03
期刊：
影响因子：
56.9
通讯作者：
Terakura, K
中科院分区：
文献类型：
--
作者：
Fang, Z;Nagaosa, N;Terakura, K
在真实空间中寻找磁单极子的努力已经在宇宙射线和粒子加速器中进行了，但还没有任何确凿的证据证明它的存在，因为它的质量非常重，类似于10(16)吉电子伏特。我们证明了在反常霍尔效应的背景下，磁单极子可以出现在可接近的低能区(类似于0.1到1电子伏特)的固体的晶动量空间中。我们报道了铁磁性晶体SrRuO_3的实验结果和第一性原理计算，为晶体动量空间中的磁单极子提供了证据。
Efforts to find the magnetic monopole in real space have been made in cosmic rays and in particle accelerators, but there has not yet been any firm evidence for its existence because of its very heavy mass, similar to10(16) giga-electron volts. We show that the magnetic monopole can appear in the crystal momentum space of solids in the accessible low-energy region (similar to0.1 to 1 electron volts) in the context of the anomalous Hall effect. We report experimental results together with first-principles calculations on the ferromagnetic crystal SrRuO3 that provide evidence for the magnetic monopole in the crystal momentum space.