黑磷中光诱导的超快滑移镜面对称破缺
Light-induced ultrafast glide-mirror symmetry breaking in black phosphorus
AI总结：
本研究通过Floquet工程在黑磷中实现超快滑移镜面对称破缺，近共振泵浦下节环处出现光诱导完全带隙且光场关闭后瞬间消失，为超快对称破缺提供新途径并推进Floquet拓扑相研究。
摘要：
对称破缺在从粒子物理到凝聚态物理的物理学各领域中均发挥着重要作用。在固态材料中，相变与底层的对称破缺深度关联，催生了丰富多样的涌现相。这类对称破缺通常通过控制化学成分、温度或施加电场、应变等方式诱导。本研究通过Floquet工程（弗洛凯工程）展示了黑磷中的超快滑移镜面对称破缺。在近共振泵浦作用下，在滑移镜面对称保护的节环处观测到光诱导的完全带隙打开，表明光诱导了滑移镜面对称的破缺。此外，该完全带隙仅在光场存在时出现，光场关闭后几乎瞬间消失（≪100 fs），表明实现了对称的超快操控且其起源于Floquet工程。本研究不仅证明光与物质相互作用是在固态材料中实现超快对称破缺的有效途径，也向人们长期追寻的Floquet拓扑相迈出了一步。
英文摘要：
Symmetry breaking plays an important role in fields of physics, ranging from particle physics to condensed matter physics. In solid-state materials, phase transitions are deeply linked to the underlying symmetry breakings, resulting in a rich variety of emergent phases. Such symmetry breakings are often induced by controlling the chemical composition and temperature or applying an electric field and strain, etc. In this work, we demonstrate an ultrafast glide-mirror symmetry breaking in black phosphorus through Floquet engineering. Upon near-resonance pumping, a light-induced full gap opening is observed at the glide-mirror symmetry protected nodal ring, suggesting light-induced breaking of the glide-mirror symmetry. Moreover, the full gap is observed only in the presence of the light-field and disappears almost instantaneously ($\ll$100 fs) when the light-field is turned off, suggesting the ultrafast manipulation of the symmetry and its Floquet engineering origin. This work not only demonstrates light-matter interaction as an effective way to realize ultrafast symmetry breaking in solid-state materials, but also moves forward towards the long-sought Floquet topological phases.
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