4.8 Article

Quantized charge fractionalization at quantum Hall Y junctions in the disorder dominated regime

期刊

NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -

出版社

NATURE PORTFOLIO
DOI: 10.1038/s41467-020-20395-7

关键词

-

资金

  1. Nanotechnology Platform Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan [JP15H05854, JP19H05603]

向作者/读者索取更多资源

Fractionalization is a phenomenon where an elementary excitation partitions into several pieces, explaining non-trivial transport through one-dimensional edge channels in quantum Hall states. By injecting charge q from a non-interaction region into an interacting and scattering region, a collective excitation with charge (1-r)q is formed by reflecting fractionalized charge rq, with fractionalization factors consistent with quantized values. The scheme allows for generating and transporting fractionalized charges along a well-defined path, demonstrating robust fractionalization in the hole-conjugate state at filling factor 2/3.
Fractionalization is a phenomenon where an elementary excitation partitions into several pieces. This picture explains non-trivial transport through a junction of one-dimensional edge channels defined by topologically distinct quantum Hall states, for example, a hole-conjugate state at Landau-level filling factor nu = 2/3. Here we employ a time-resolved scheme to identify an elementary fractionalization process; injection of charge q from a non-interaction region into an interacting and scattering region of one-dimensional channels results in the formation of a collective excitation with charge (1-r)q by reflecting fractionalized charge rq. The fractionalization factors, r=0.340.03 for nu = 2/3 and r=0.49 +/- 0.03 for nu = 2, are consistent with the quantized values of 1/3 and 1/2, respectively, which are expected in the disorder dominated regime. The scheme can be used for generating and transporting fractionalized charges with a well-defined time course along a well-defined path. Previous work has focused on charge fractionalization in quantum Hall edge channels coupled by Coulomb interaction without inter-channel tunneling. Here, the authors investigate the regime of disorder-induced tunneling, demonstrating robust fractionalization in the hole-conjugate state at filling factor 2/3.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据