论文标题
多体相互作用对绝缘子中De Haas-Van Alphen振荡的影响
Effect of many-body interaction on de Haas-van Alphen oscillations in insulators
论文作者
论文摘要
de haas-van alphen（DHVA）振荡是磁化强度作为反磁场的函数的振荡。这些振荡通常被认为是费米表面的特性，因此是金属特性。然而，最近，在某些具有狭窄间隙和倒置带结构的绝缘子中，这种振荡在实验和理论上都显示出来。在这项工作中，我们开发了一种理论来研究多体相互作用对这些非常规振荡的影响。我们认为相互作用弱，重点是准粒子光谱对这些振荡的影响。我们发现相互作用具有异常效果：与金属不同，在某个方向上，即使相互作用在触及触及范围的情况下，振动振幅也可能会大大增强，即使在零和非零温度下也可以得到大幅增强。
De Haas-van Alphen (dHvA) oscillations are oscillations in the magnetization as a function of the inverse magnetic field. These oscillations are usually considered to be a property of the Fermi surface and, hence, a metallic property. Recently, however, such oscillations have been shown to arise, both experimentally and theoretically, in certain insulators which have a narrow gap and an inverted band structure. In this work, we develop a theory to study the effect of many-body interaction on these unconventional oscillations. We consider weak interaction, focusing on the effect of renormalization of the quasiparticle spectrum on these oscillations. We find that interaction has an unusual effect: unlike in metals, in a certain regime the amplitude of oscillations may be enhanced substantially, both at zero and nonzero temperatures, even when the interaction is perturbatively weak.
