Statistics of Fractionalized Excitations through Threshold Spectroscopy
Statistics of Fractionalized Excitations through Threshold Spectroscopy
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DOI：
10.1103/physrevlett.118.227201
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发表时间：
2017-05-31
影响因子：
8.6
通讯作者：
Wilczek, Frank
中科院分区：
文献类型：
--
作者：
Morampudi, Siddhardh C.;Turner, Ari M.;Wilczek, Frank
我们发现，中性任意子激发在材料的光谱测量中有一个特征：在阈值附近的谱函数的低能量起始值遵循普遍的幂定律，其指数只取决于任意子的统计。这提供了一条利用中子散射和隧道光谱等实验技术检测拓扑有序态(如带隙量子自旋液体和假设的分数陈氏绝缘体)中的任意子统计的途径。我们的计算也解释了最近自旋系统中的一些理论结果。
We show that neutral anyonic excitations have a signature in spectroscopic measurements of materials: The low-energy onset of spectral functions near the threshold follows universal power laws with an exponent that depends only on the statistics of the anyons. This provides a route, using experimental techniques such as neutron scattering and tunneling spectroscopy, for detecting anyonic statistics in topologically ordered states such as gapped quantum spin liquids and hypothesized fractional Chern insulators. Our calculations also explain some recent theoretical results in spin systems.