Enhanced quantum oscillations in Kondo insulators

Yen Wen Lu*, Po Hao Chou, Chung Hou Chung, Ting Kuo Lee, Chung Yu Mou

*此作品的通信作者

    研究成果: Article同行評審

    1 引文 斯高帕斯(Scopus)

    摘要

    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 nonrigidity of the electronic structure results in observable quantum oscillation Kondo insulators. This effect provides a way to probe the Fermi surface geometry of insulators.

    原文English
    文章編號115102
    期刊Physical Review B
    101
    發行號11
    DOIs
    出版狀態Published - 2 三月 2020

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