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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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拓学光子合金 拓学光子合金

Tiantao Qu1, Mudi Wang2, Xiaoyu Cheng3

  • 1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China.

Physical review letters
|June 15, 2024
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概括

我们介绍了光子合金,一种新型的非周期性拓材料. 这些合金支持带有最小磁性材料的奇拉边缘状态,即使有局部时间逆向对称性破坏.

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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
  • 光子学 是一个光子学.

背景情况:

  • 拓材料具有独特的边缘状态,受到拓的保护.
  • 非周期系统为设计材料特性提供了新的方法.
  • 光子晶体通过周期结构控制光的传播.

研究的目的:

  • 引入和实验实现光子合金作为一种新型的非周期性拓材料.
  • 研究这些合金中拓边缘状态的出现.
  • 描述光子合金中的拓性质和对称性破坏.

主要方法:

  • 用混合非磁性和磁性棒制造2D光子晶体.
  • 微波模式实验探测材料属性.
  • 使用反射相的绕线对拓状态的表征.

主要成果:

  • 光子合金在低度的磁棒中维持非互惠的性边缘状态.
  • 替代合金中的拓行为在热力学极限中接近零值度.
  • 尽管局部,而不是全球性的时间逆转对称性破裂,但奇拉边缘状态仍在出现.

结论:

  • 光子合金代表了一种新型无序的拓材料.
  • 这些材料提供可调节带间隙和拓设备应用的机会.
  • 这些发现挑战了对无序系统中拓相变的传统理解.