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在量子接触点运输中反帕菲安拓秩序的指纹

Jinhong Park^1,2, Christian Spånslätt³, Alexander D Mirlin^1,2

¹Institute for Quantum Materials and Technologies, <a href="https://ror.org/04t3en479">Karlsruhe Institute of Technology</a>, 76131 Karlsruhe, Germany.

Physical review letters

|July 12, 2024

概括

在填充 ν=5/2 时的分数量子霍尔状态具有未知的拓顺序. 本研究确定了反Pfaffian (aPf) 状态的独特导电特征,通过射击噪声测量将其与其他候选物区分开来.

科学领域:

凝聚物质物理学凝聚物质物理学
量子霍尔效应是一种量子霍尔效应.
拓学的量子物质

背景情况:

在填充 ν=5/2 时,分数量子霍尔状态的拓顺序尚未在实验中得到证实.
候选状态包括Pfaffian,粒子孔Pfaffian和反Pfaffian (aPf).

研究的目的:

通过实验来区分候选拓序列对于n=5/2分数量子霍尔状态.
为了识别反帕法菲 (aPf) 国家独特的运输签名.

主要方法:

在量子点接触装置中研究导电量和射击噪声.
在充电平衡模式下运行设备.
在连贯和收费平衡制度中分析运输属性.

主要成果:

孔结合反Pfaffian (aPf) 状态通过两个不同的机制,独特地产生了G={7/3) e^{2}/h的导电平原.
射击噪声测量可以区分这两个机制.
在一致的制度中确定了aPf状态的独特行为特征.

结论:

拟议的射击噪声和导电量测量可以实验性地确定反Pfaffian (aPf) 拓顺序.
这项工作为解决关于 ν=5/2 分数量子霍尔态的拓顺序的悬而未决问题提供了一条途径.

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