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相关概念视频

The de Broglie Wavelength02:32

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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波动对密度波浪的机制.

Chandan Setty1,2, Laura Fanfarillo3,4, P J Hirschfeld5

  • 1Department of Physics, University of Florida, Gainesville, FL, USA. csetty@rice.edu.

Nature communications
|June 1, 2023
PubMed
概括
此摘要是机器生成的。

强合的超导体表现出独特的配对相. 一个新的模型揭示了波动的对密度波形状态,可以过渡到超导或对密度波形阶段.

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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 超导理论 超导理论

背景情况:

  • 弱合超导体 (BCS理论) 将库珀对的形成限制在围绕费米能量 (EF) 的狭窄能量窗口上.
  • 强合超导体 (例如,酸盐,FeSe,SrTiO,冷原子冷凝) 的配对尺度 (EB) 相当于或大于EF.
  • 假设cuprates中的伪间隙状态涉及波动的对密度波,但缺乏支持的微观模型.

研究的目的:

  • 开发一种分析可解决的模型,用于检查强度合超导体中的配对相.
  • 调查异构相互作用对这些配对阶段的影响.
  • 了解现实系统中波动和远程对密度波的出现.

主要方法:

  • 开发一个最小的,可分析解决的模型.
  • 在强合和异型相互作用条件下对联相的分析.
  • 在有限和低温下对相变的研究.

主要成果:

  • 在不稳定温度 (Ti) 下发现一个不寻常的有限温度阶段,其特点是局部对相关性与非零质量中心动量,但缺乏远程顺序.
  • 证明这种波动的对密度波可以在低温下凝结成均的d波超导体或对密度波状态,这取决于相互作用强度.
  • 该模型为理解波动和远程对密度波提供了一个统一的框架.

结论:

  • 拟议的模型成功地描述了强度合体制中的配对现象.
  • 它为波动的对密度波的存在及其随后的凝结提供了微观解释.
  • 这项工作统一了对强度合系统中不同配对状态的理解.