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首页> 外文期刊>Physical review >Interaction-driven topological phase transitions in fermionic SU(3) systems
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Interaction-driven topological phase transitions in fermionic SU(3) systems

机译:Fermionic Su(3)系统中的相互作用拓扑相变

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摘要

We consider SU(3) fermions on the triangular lattice in the presence of a gauge potential which stabilizes a quantum Hall insulator (QHI) at the density of one particle per lattice site. We investigate the effect of the Hubbard interaction, favoring magnetic long-range order, and a three-sublattice potential (TSP), favoring a normal insulator (NI), on the system. For a weak TSP we find that the Hubbard interaction drives the QHI into a three-sublattice magnetic Mott insulator (MMI). For intermediate values of the TSP we identify two transition points upon increasing the Hubbard interaction. The first transition is from the NI to the QHI and the second transition is from the QHI to the MMI. For large values of the TSP a charge-ordered magnetic insulator (COMI) emerges between the NI and the QHI, leading to an interaction-driven COMI-to-QHI transition.
机译:我们在规模潜力存在下考虑三角形晶格上的SU(3)柑橘,该潜力稳定在每个晶格部位的一个颗粒的密度的量子霍尔绝缘体(QHI)。我们研究了哈贝德相互作用,偏好的磁性远程顺序和三个子图示潜力(TSP)的效果,优先于系统上的普通绝缘体(NI)。对于弱TSP,我们发现Hubbard交互驱动QHI进入三个子块磁性Mott绝缘体(MMI)。对于TSP的中间值,我们在增加Hubbard交互时识别两个转换点。第一次转变是从NI到QHI,第二转变从QHI到MMI。对于TSP的大量值,Ni和QHI之间的电荷有序的磁绝缘体(COMI)出现,导致交互驱动的COMI-QHI转换。

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  • 来源
    《Physical review》 |2020年第24期|245159.1-245159.6|共6页
  • 作者单位

    Institut fuer Theoretische Physik Goethe-Universitaet 60438 Frankfurt am Main Germany;

    Institut fuer Theoretische Physik Goethe-Universitaet 60438 Frankfurt am Main Germany Center for Quantum Spintronics Department of Physics Norwegian University of Science and Technology NO-7491 Trondheim Norway;

    Institut fuer Theoretische Physik Goethe-Universitaet 60438 Frankfurt am Main Germany;

    Institut fuer Theoretische Physik Goethe-Universitaet 60438 Frankfurt am Main Germany;

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