3/2 fractional quantum Hall plateau in confined two-dimensional electron gas
| Autor: | Loren Pfeiffer, Ruoxi Zhang, Hailong Fu, Jian Sun, Zheyi Zhu, Xi Lin, Pengjie Wang, Haiwen Liu, Yijia Wu, Xincheng Xie, Ken W. West, Pujia Shan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Work (thermodynamics) Science General Physics and Astronomy Quantum Hall FOS: Physical sciences 02 engineering and technology Quantum Hall effect Plateau (mathematics) General Biochemistry Genetics and Molecular Biology Article 03 medical and health sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) lcsh:Science Quantum computer Physics Multidisciplinary Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Filling factor General Chemistry 021001 nanoscience & nanotechnology 3. Good health 030104 developmental biology Phase transitions and critical phenomena lcsh:Q 0210 nano-technology Fermi gas Realization (systems) Excitation |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-019-12245-y |
| Popis: | Even-denominator fractional quantum Hall (FQH) states, such as 5/2 and 7/2, have been well known in a two-dimensional electron gas (2DEG) for decades and are still investigated as candidates of non-Abelian statistics. In this paper, we present the observation of a 3/2 FQH plateau in a single-layer 2DEG with lateral confinement at a bulk filling factor of 5/3. The 3/2 FQH plateau is quantized at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left( {\frac{h}{{e^2}}} \right)/\left( {\frac{3}{2}} \right)$$\end{document}he2∕32 within 0.02%, and can survive up to 300 mK. This even-denominator FQH plateau may imply intriguing edge structure and excitation in FQH system with lateral confinement. The observations in this work demonstrate that understanding the effect of the lateral confinement on the many-body system is critical in the pursuit of important theoretical proposals involving edge physics, such as the demonstration of non-Abelian statistics and the realization of braiding for fault-tolerant quantum computation. Fractional quantum Hall states in 2D electron gases arise due to strong electron-electron interactions, which makes a general theoretical understanding difficult. Fu et al. present data showing the ν = 5/3 quantum Hall state has a 3/2 plateau in the diagonal resistance that has not been captured by existing models. |
| Databáze: | OpenAIRE |
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