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arXiv 1409.6722cond-mat.str-elcond-mat.mtrl-sci
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强关联拓扑绝缘体SmB6和PuB6模型中的扫描隧道谱和表面准粒子干涉

Scanning tunneling spectroscopy and surface quasiparticle interference in models for the strongly correlated topological insulators SmB6 and PuB6

Pier Paolo Baruselli, Matthias Vojta

摘要:

SmB 6是拓扑近藤绝缘体的候选化合物之一,拓扑近藤绝缘体是一类结合了非平凡拓扑能带结构和强电子关联的材料。在这里,我们采用了多带紧束缚的描述,辅之以从粒子的方法来解释强相互作用,在理论上研究的表面态签名的扫描隧道光谱(STS)和准粒子干涉(QPI)。我们讨论了三个表面狄拉克锥的SmB6的自旋结构,并提供具体的预测所产生的QPI信号的能量和动量的依赖性。我们的结果也适用于PuB 6,一个强相关的拓扑绝缘体具有非常相似的电子结构。

英文摘要:

SmB6 is one of the candidate compounds for topological Kondo insulators, a class of materials which combines a non-trivial topological band structure with strong electronic correlations. Here we employ a multiband tight-binding description, supplemented by a slave-particle approach to account for strong interactions, to theoretically study the surface-state signatures in scanning tunneling spectroscopy (STS) and quasiparticle interference (QPI). We discuss the spin structure of the three surface Dirac cones of SmB6 and provide concrete predictions for the energy and momentum dependence of the resulting QPI signal. Our results also apply to PuB6, a strongly correlated topological insulator with a very similar electronic structure.

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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