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arXiv 2103.13672cond-mat.str-el
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强自旋-轨道相互作用下具有手征性和电荷有序性的完美平带

Perfect flat band with chirality and charge ordering out of strong spin-orbit interaction

Hiroki Nakai, Chisa Hotta

摘要:

自旋轨道相互作用确立了自己作为一个主要的角色球员在现代凝聚态物质的涌现现象,包括一个拓扑绝缘体,自旋液体和自旋相关的运输。然而,它的功能是相当有限的,增加拓扑性质的每一个阶段的物质。我们用旋量线图理论证明了在5d烧绿石电子系统中实现的很强的自旋-轨道相互作用产生多重简并的完美平带。与之前的任何平带不同,存在于那里的电子以SU(2)规范场控制的自旋选择性方式相互破坏性干涉,从而定域在实空间中。这些电子通过自组织它们的局域波函数来避免库仑相互作用。这引起了三聚体的电荷订购手牵手与刚性的自旋手性,这可以解释最近发现的异国情调的低温绝缘相CsW 2 O 6。

英文摘要:

Spin-orbit interaction established itself as a major role player for emergent phenomena in modern condensed matter including a topological insulator, spin liquid and spin-dependent transports. However, its function is rather limited to adding topological nature to each phases of matter. We prove by our spinor line graph theory that a very strong spin-orbit interaction realized in 5d pyrochlore electronic systems generates multiply degenerate perfect flat bands. Unlike any of the previous flat bands, the electrons living there localize in real space by destructively interfering with each other in a spin selective manner ruled by the SU(2) gauge field. These electrons avoid the Coulomb interaction by self-organizing their localized wave functions. This gives rise to the trimerized charge ordering hand in hand with a stiff spin chirality, which may explain the recently found exotic low-temperature insulating phase of CsW2O6.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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