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arXiv 2209.09595cond-mat.mes-hall
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Rice-Mele模型中的高次谐波产生:带间跃迁引起的带内电流的作用

High-harmonic generation in the Rice-Mele model: Role of intraband current originating from interband transition

Kohei Nagai, Yuta Murakami, Akihisa Koga

AI总结:

本文研究Rice-Mele模型中由带间跃迁引起的带内电流对高次谐波产生的作用,发现该贡献在能隙小于激发频率且接近半填充时至关重要。

摘要:

我们考虑Rice-Mele模型中的高次谐波产生(HHG),以研究通过带间跃迁改变带内偶极子所产生的带内电流的作用。这一贡献在以往的工作中常被忽略,但对于光-物质耦合的一致理论表述是必要的。我们证明,当能隙小于或接近激发频率且系统接近半填充时,该贡献变得至关重要。

英文摘要:

We consider high-harmonic generation (HHG) in the Rice-Mele model to study the role of the intraband current originating from the change of the intraband dipole via interband transition. This contribution, which has been often neglected in previous works, is necessary for the consistent theoretical formulation of the light-matter coupling. We demonstrate that the contribution becomes crucial when the gap is smaller than or comparable to the excitation frequency and the system is close to the half filling.

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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