2022
DOI: 10.1021/acs.nanolett.2c02701
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Helical Luttinger Liquid on the Edge of a Two-Dimensional Topological Antiferromagnet

Abstract: A boundary helical Luttinger liquid (HLL) with broken bulk time-reversal symmetry belongs to a unique topological class that may occur in antiferromagnets (AFM). Here, we search for signatures of HLL on the edge of a recently discovered topological AFM, MnBi2Te4 even-layer. Using a scanning superconducting quantum interference device, we directly image helical edge current in the AFM ground state appearing at its charge neutral point. Such a helical edge state accompanies an insulating bulk which is topologica… Show more

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Cited by 4 publications
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“…The layer polarization of the current can be detected through the scanning microwave impedance microscopy images. The measured current signal on the top layer of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} $\rm {MnBi_2Te_4}$\end{document} for the TLF will be much stronger than that for the BLF, although the conductances for the two cases are both quantized [ 54 , 55 , 84 ].…”
Section: Introductionmentioning
confidence: 99%
“…The layer polarization of the current can be detected through the scanning microwave impedance microscopy images. The measured current signal on the top layer of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} $\rm {MnBi_2Te_4}$\end{document} for the TLF will be much stronger than that for the BLF, although the conductances for the two cases are both quantized [ 54 , 55 , 84 ].…”
Section: Introductionmentioning
confidence: 99%