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arXiv 2009.06289cond-mat.mes-hallcond-mat.mtrl-sci
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应变Weyl半金属中的反常等离子体激元模

Anomalous plasmon mode in strained Weyl semimetals

Shiva Heidari, Dimitrie Culcer, Reza Asgari

摘要:

利用Landau费米液体和手征动力学理论,在应变Weyl半金属中发现了一种奇异的反常等离子体激元模式,其中准粒子相互作用由长程库仑作用和残余短程相互作用模拟.带隙的集体模式是由体和表面之间的动态电荷泵抽产生的,其行为类似于$k_{\rm F}^{-1}$。电荷振荡由感应电场和背景赝场之间的耦合精确地确定。这种新的模式单向分散沿伪磁场,并表现在一个不寻常的热导率在明显违反的Wiedemann-Franz定律。激发可以通过太赫兹机制中晶格的机械振动来实验实现。

英文摘要:

An exotic anomalous plasmon mode is found in strained Weyl semimetals utilizing the topological Landau Fermi liquid and chiral kinetic theories, in which quasiparticle interactions are modeled by long-range Coulomb and residual short-range interactions. The gapped collective mode is derived from the dynamical charge pumping between the bulk and the surface and behaves like $k_{\rm F}^{-1}$. The charge oscillations are accurately determined by the coupling between the induced electric field and the background pseudofields. This novel mode unidirectionally disperses along the pseudomagnetic field and manifests itself in an unusual thermal conductivity in apparent violation of the Wiedemann-Franz law. The excitation can be achieved experimentally by mechanical vibrations of the crystal lattice in the THz regime.

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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