arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.09401cond-mat.supr-concond-mat.str-el
收藏

超导体中的Higgs模

Higgs Mode in Superconductors

Ryo Shimano, Naoto Tsuji

摘要:

当物理系统的连续对称性自发破缺时,通常会出现两种集体模式:序参量涨落的振幅模式和相位模式。对于超导体,振幅模式最近被称为“希格斯模式”,因为它是粒子物理学中希格斯玻色子的凝聚态类似物。希格斯模式是序参量的标量激发,与电荷或自旋涨落不同,因此不与电磁场线性耦合。这就是为什么在最初的理论预测之后的半个多世纪里,超导体中的希格斯模式一直逃避实验观测,除了电荷密度波共存系统。然而,随着非线性和时间分辨太赫兹光谱技术的发展,通过非线性光-Higgs耦合研究Higgs模已经成为可能。本文综述了超导体中Higgs模的研究进展。

英文摘要:

When a continuous symmetry of a physical system is spontaneously broken, two types of collective modes typically emerge: the amplitude and phase modes of the order-parameter fluctuation. For superconductors, the amplitude mode is recently referred to as the ''Higgs mode'' as it is a condensed-matter analogue of a Higgs boson in particle physics. Higgs mode is a scalar excitation of the order parameter, distinct from charge or spin fluctuations, and thus does not couple to electromagnetic fields linearly. This is why the Higgs mode in superconductors has evaded experimental observations over a half century after the initial theoretical prediction, except for a charge-density-wave coexisting system. With the advance of nonlinear and time-resolved terahertz spectroscopy techniques, however, it has become possible to study the Higgs mode through the nonlinear light-Higgs coupling. In this review, we overview recent progresses on the study of the Higgs mode in superconductors.

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。

↑