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Direct observation of topological magnon edge states

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arxiv 2410.18960 v1 pith:37E2GOJL submitted 2024-10-24 cond-mat.mes-hall cond-mat.str-el

Jihai Zhang , Meng-Han Zhang , Peigen Li , Zizhao Liu , Ye Tao , Hongkun Wang , Dao-Xin Yao , Donghui Guo
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Dingyong Zhong
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classification cond-mat.mes-hallcond-mat.str-el
keywords edgemagnonstatesdirecttopologicaltunnelingconductancemcis
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Magnon Chern insulators (MCIs) exhibit unique topological magnon band structures featuring chiral edge states. Direct observations of the topologically protected magnon edge states have long been pursued. Here, we report the spatially resolved detection of magnon edge states in a two-dimensional ferromagnet with honeycomb lattice (single-layer chromium triiodide). Using scanning tunneling microscopy, we observed magnon-assisted inelastic tunneling conductance and revealed the gapped magnon spectra with enhanced signals at the van Hove singularities. Extra tunneling conductance contributed from the magnon edge states was detected at three different edge configurations. Our work provided direct evidence proving the existence of MCI states down to the single-layer limit, initiating spatially-resolved explorations on exotic properties arising from topological edge states of MCIs.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fundamentals and applications of Van der Waals magnets in magnon spintronics

    cond-mat.mes-hall 2024-11 accept novelty 3.0 of 10

    A perspective arguing that van der Waals magnets offer an ideal, tunable platform for magnon spintronics, while outlining the remaining experimental challenges.

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