在非赫密斯延长的基塔耶夫链中非传统的量子关键性
S Rahul1,2,3, Nilanjan Roy4,5, Ranjith R Kumar1,2
1Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India.
Scientific reports
|July 26, 2023
概括
这项研究探讨了扩展的基塔耶夫链中的量子临界性和拓相过渡. 非赫米斯系的因素引入了孤立的临界点和不同的临界指数,与赫米斯系不同.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子力学就是量子力学.
- 拓学材料 拓学材料
背景情况:
- 量子临界性和拓相过渡是凝聚物质中的关键现象.
- 基塔耶夫链是研究这些转变的一个基本模型.
研究的目的:
- 为了研究量子临界性和拓阶段过渡在一个扩展的基塔耶夫链与非赫米特参数.
- 为了比较非赫米斯系统与他们的赫米斯系统的行为.
主要方法:
- 对延长的基塔耶夫链模型的分析.
- 在动量空间中研究临界线和无间隙点.
- 检查最低激发的真实和虚构组成部分.
主要成果:
- 发现了多个没有间隙的点,其位置沿着临界线变化.
- 在拓过渡附近的激发元件中同时消失和标志翻转的观察.
- 与赫米特病例相比,引入非赫米特病因导致孤立的临界点和较少的多临界点.
- 在非赫米特系统中,对于多关键点和关键点的不同关键指数.
结论:
- 非赫米特因素在扩展的基塔耶夫链中显著改变量子关键性和拓相过渡.
- 临界点和指数的行为明显不同于赫米特系统,为拓材料设计提供了新的途径.
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