论文标题
增强的昆多绝缘子中的量子振荡
Enhanced quantum oscillations in Kondo insulators
论文作者
论文摘要
量子振荡长期以来一直被认为是金属中费米表面的表现。但是，最近在Kondo绝缘子中观察到它们。我们检查了由于近托绝缘子中的Landau水平而引起的近藤筛选。结果表明，即使对于巨大的绝缘间隙，量子振荡的明显幅度与实验观测一致的量子振荡也存在于磁化和电阻率中。具体而言，我们表明，由于传导中的Landau水平与F-Orbit电子之间的周期性对齐，近托筛选本身会进行振荡，因此电子结构会随磁场振荡。我们的结果解释了实验中观察到的量子振荡的主要特征。它们表明电子结构的非r依性导致可观察到的量子振荡近藤绝缘体。这种新效果提供了一种探测绝缘体费米表面几何形状的新方法。
Quantum oscillations have long been regarded as the manifestation of the Fermi surface in metals. However, they were recently observed in Kondo insulators. We examine the Kondo screening due to Landau levels in Kondo insulators. It is shown that even for large Kondo insulating gaps, appreciable amplitudes of quantum oscillations that are consistent with experimental observations are present both in magnetization and resistivity. Specifically, we show that due to the periodic alignment between the Landau levels in the conduction and the f-orbit electrons, the Kondo screening itself undergoes oscillations so that the electronic structure oscillates with the magnetic field. Our results explain main features of quantum oscillations observed in experiments. They indicate that the non-rigidity of the electronic structure results in observable quantum oscillations Kondo insulators. This new effect provides a new way to probe the Fermi surface geometry of insulators.
