论文标题
磁性杂质作为用旋子费米表面的U（1）量子自旋液体的局部探针
Magnetic Impurity as a Local Probe of the U(1) Quantum Spin Liquid with Spinon Fermi Surface
论文作者
论文摘要
我们解决了与Spinon Fermi表面耦合到U（1）量子旋转液体并计算杂质光谱函数的磁性杂质的问题。使用从属转子均值场进近结合量规场波动，我们发现位于下部哈伯德带顶部的峰，在上哈伯德频带的底部有一个峰可以在杂质频谱函数中出现。哈伯德带边缘的峰来自仪表场波动引起的Spinon Chargon结合在Spinon Kondo筛选云的云中。对于嵌入Mott绝缘体中的磁性杂质，我们的发现表明，在状态光谱的杂质密度中，在Hubbard带边缘的一对峰出现提供了有力的证据，表明宿主Mott绝缘子是U（1）量子旋转液体，带有Spinon Fermi表面。
We solve the problem of a magnetic impurity coupled to a U(1) quantum spin liquid with spinon Fermi surface and compute the impurity spectral function. Using the slave rotor mean field approach combined with gauge field fluctuations, we find that a peak located at the top of the lower Hubbard band and one at the bottom of the upper Hubbard band can emerge in the impurity spectral function. The peaks at the Hubbard band edges arise from the gauge field fluctuations induced spinon chargon binding inside the spinon Kondo screening cloud of the magnetic impurity. For a magnetic impurity embedded in a Mott insulator, our findings suggest that the emergence of a pair of peaks at the Hubbard band edges in the impurity density of states spectra provides strong evidence that the host Mott insulator is a U(1) quantum spin liquid with spinon Fermi surface.
