论文标题
激子绝缘子中的Bardasis-Schrieffer Polariton
Bardasis-Schrieffer polaritons in excitonic insulators
论文作者
论文摘要
超导体中的Bardasis-Schrieffer模式是亚域配对通道中的波动，例如S波超导体中的D波波动。这种快速的通信表明，这些模式也通常发生在激子绝缘子中。在S波激素绝缘子中，在间隙能量下方存在P波的Bardasis-Schrieffer模式，具有光学活跃，并且与光子强烈杂交以形成Bardasis-Schrieffer Polaritons，在远场和近场光学实验中都可以观察到。
Bardasis-Schrieffer modes in superconductors are fluctuations in subdominant pairing channels, e.g., d-wave fluctuations in an s-wave superconductor. This Rapid Communication shows that these modes also generically occur in excitonic insulators. In s-wave excitonic insulators, a p-wave Bardasis-Schrieffer mode exists below the gap energy, is optically active and hybridizes strongly with photons to form Bardasis-Schrieffer polaritons, which are observable in both far-field and near-field optical experiments.
