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玻璃玻璃和费米玻璃玻璃

Korekiyo Takahashi^1,2,3, Keiji Nakatsugawa^4,5, Masahito Sakoda^6,4

¹Department of Applied Physics, Hokkaido University, Sapporo, 060-8628, Japan. korere@gmail.com.

Scientific reports

|August 1, 2023

概括

研究人员在二维超导体中发现了从费米玻璃到斯玻璃的通用过渡. 这一发现为这些材料中的量子相变提供了新的理解.

科学领域:

凝聚物质物理学凝聚物质物理学
量子材料量子材料是一种量子材料.
超导电性超导电性超导电性

背景情况:

二维 (2D) 超导材料表现出从局部状态到超导性的量子相变.
这种过渡涉及玻色子 (库珀对) 从费米玻璃形成并通过玻璃玻璃阶段进行.
对于费米玻璃到斯玻璃过渡的普遍描述一直缺乏.

研究的目的:

为2D超导体中从费米玻璃到波斯玻璃的量子相位过渡建立一个通用表达式.
通过分析不同的物质系统来研究这种过渡的普遍性.
为过渡动态提出一个新的模型.

主要方法:

使用简单的$\beta$-函数进行实验性重新规范化组流分析.
分析了两个不同的二维超导系统:一个基于N-D的层叠矿和一个超薄的Pb薄膜.
实验数据与传统的自相一致的 $\beta$ 函数模型进行比较.

主要成果:

费米玻璃的实验数据与传统的自相一致的$\beta$-函数保持一致.
在两个系统的弱局部化模式中,观察到垂直于常规的$\beta$函数的意想不到的流.
确定了一个新的二维关键板电阻接近 $\hbar^2/e^2$ 的过渡.

结论:

一个普遍的实验性重新规范化群流从费米玻璃到波斯玻璃已经被发现.
这些发现揭示了弱局部化制度的新型过渡动态,偏离了传统模型.
提出了从斯玻璃到费米玻璃的全新通用过渡,其特点是特定的临界板电阻.

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