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使用周期性驱动生成更高阶的拓绝缘体

Arnob Kumar Ghosh^1,2,3, Tanay Nag^3,4, Arijit Saha^1,2

¹Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, India.

Journal of physics. Condensed matter : an Institute of Physics journal

|November 20, 2023

概括

本研究探讨了使用Floquet驱动器生成更高阶拓绝缘体 (HOTI). 研究人员展示了在2D和3D系统中创建新的动态拓状态,包括异常的π模式.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学
量子力学就是量子力学.

背景情况:

拓绝缘体 (TI) 具有独特的边界状态,由对称性保护.
高级TI (HOTI) 与传统TI相比,在较低的维度 (d-n) 上表现出拓边界状态.
拓相的非平衡控制仍然是一个重大挑战.

研究的目的:

探索周期性Floquet驱动协议以生成更高阶的拓相.
为了研究与传统的0模式一起创建动态异常的π模式.
在2D和3D系统中展示Floquet的更高阶拓模式.

主要方法:

使用定期的Floquet驱动协议来设计拓阶段.
从非拓或第一阶层拓阶段开始.
系统地分析2D和3D网格中的Floquet高阶拓模式.

主要成果:

从非拓或第一阶段成功生成了Floquet高阶拓绝缘体 (HOTI).
证明了动态异常 π 模式的创建,只能在动态系统中实现.
举例的Floquet二阶TI (FSOTI) 在2D中使用0和π角模式.
展示了3D FSOTI和Floquet三级TI,分别具有1D链和0D角模式.

结论:

周期性Floquet驱动提供了一个强大的路线来实现新的非平衡拓阶段.
动态异常的π模式可以在Floquet HOTIs中生成,扩展拓现象的景观.
提出的方法提供了一个系统的框架,用于在各种维度中探索和设计Floquet高阶拓状态.

关键词:

花系统是花系统.标识 ID 标识 ID 标识一代又一代,一代又一代的世代.一个更高层次的层次.绝缘体是一种绝缘体.定期的定期的定期的定期的定期.拓学上的地形学.

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