arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0911.4264cond-mat.mes-hall
收藏

2/3复合分数边缘信道的散粒噪声和分数电荷

Shot Noise and Fractional Charge at the 2/3 Composite Fractional Edge Channel

Aveek Bid, Nissim Ofek, Moty Heiblum, Vladimir Umansky, Diana Mahalu

摘要:

边缘模式的确切结构在“空穴共轭”分数量子霍尔态仍然是一个未解决的问题,尽管显着的实验和理论努力致力于他们的理解。最近,有一个激增的兴趣,在这样的研究导致的中性模式,在某些情况下,这可能会导致奇异的统计特性的激发搜索。在这封信中,我们报告详细测量的散粒噪声,产生的分区更熟悉的2/3状态。我们发现在最低温度下的电荷分数为(2/3)e,在升高的温度下降低到e/3。令人惊讶的是,强散粒噪声已被测量到一个明确的1/3平台上划分的2/3状态。这种行为表明,一个不寻常的图片的复合边缘通道完全不同于公认的。

英文摘要:

The exact structure of edge modes in `hole conjugate' fractional quantum Hall states remains an unsolved issue despite significant experimental and theoretical efforts devoted to their understanding. Recently, there has been a surge of interest in such studies led by the search for neutral modes, which in some cases may lead to exotic statistical properties of the excitations. In this letter we report on detailed measurements of shot noise, produced by partitioning of the more familiar 2/3 state. We find a fractional charge of (2/3)e at the lowest temperature, decreasing to e/3 at an elevated temperature. Surprisingly, strong shot noise had been measured on a clear 1/3 plateau upon partitioning the 2/3 state. This behavior suggests an uncommon picture of the composite edge channels quite different from the accepted one.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑