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000894929 1001_ $$0P:(DE-Juel1)174027$$aZhu, Fengfeng$$b0$$eCorresponding author
000894929 245__ $$aTopological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe3 and CrGeTe3 : Toward intrinsic gap-tunability
000894929 260__ $$aWashington, DC [u.a.]$$bAssoc.$$c2021
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000894929 520__ $$aThe bosonic analogs of topological insulators have been proposed in numerous theoretical works, but their experimental realization is still very rare, especially for spin systems. Recently, two-dimensional (2D) honeycomb van der Waals ferromagnets have emerged as a new platform for topological spin excitations. Here, via a comprehensive inelastic neutron scattering study and theoretical analysis of the spin-wave excitations, we report the realization of topological magnon insulators in CrXTe3 (X = Si, Ge) compounds. The nontrivial nature and intrinsic tunability of the gap opening at the magnon band-crossing Dirac points are confirmed, while the emergence of the corresponding in-gap topological edge states is demonstrated theoretically. The realization of topological magnon insulators with intrinsic gap-unability in this class of remarkable 2D materials will undoubtedly lead to new and fascinating technological applications in the domain of magnonics and topological spintronics.
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000894929 7001_ $$0P:(DE-Juel1)174385$$aZhang, Lichuan$$b1
000894929 7001_ $$0P:(DE-Juel1)171236$$aWang, Xiao$$b2
000894929 7001_ $$0P:(DE-Juel1)162449$$aDos Santos, Flaviano José$$b3
000894929 7001_ $$0P:(DE-Juel1)173891$$aSong, Junda$$b4$$ufzj
000894929 7001_ $$0P:(DE-Juel1)156453$$aMueller, Thomas$$b5
000894929 7001_ $$0P:(DE-Juel1)130943$$aSchmalzl, Karin$$b6
000894929 7001_ $$0P:(DE-Juel1)130944$$aSchmidt, Wolfgang F.$$b7
000894929 7001_ $$0P:(DE-HGF)0$$aIvanov, Alexandre$$b8
000894929 7001_ $$0P:(DE-HGF)0$$aPark, Jitae T.$$b9
000894929 7001_ $$0P:(DE-HGF)0$$aXu, Jianhui$$b10
000894929 7001_ $$0P:(DE-HGF)0$$aMa, Jie$$b11
000894929 7001_ $$0P:(DE-Juel1)130805$$aLounis, Samir$$b12
000894929 7001_ $$0P:(DE-Juel1)130548$$aBlügel, Stefan$$b13
000894929 7001_ $$0P:(DE-Juel1)130848$$aMokrousov, Yuriy$$b14$$eCorresponding author
000894929 7001_ $$0P:(DE-Juel1)130991$$aSu, Yixi$$b15$$eCorresponding author
000894929 7001_ $$0P:(DE-Juel1)130572$$aBrückel, Thomas$$b16
000894929 773__ $$0PERI:(DE-600)2810933-8$$a10.1126/sciadv.abi7532$$gVol. 7, no. 37$$n37$$peabi7532$$tScience advances$$v7$$x2375-2548$$y2021
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