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000903035 1001_ $$00000-0001-6274-2833$$aVidal, R. C.$$b0
000903035 245__ $$aOrbital Complexity in Intrinsic Magnetic Topological Insulators MnBi 4 Te 7 and MnBi 6 Te 10
000903035 260__ $$aCollege Park, Md.$$bAPS$$c2021
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000903035 520__ $$aUsing angle-resolved photoelectron spectroscopy (ARPES), we investigate the surface electronic structure of the magnetic van der Waals compounds MnBi4Te7 and MnBi6Te10, the n=1 and 2 members of a modular (Bi2Te3)n(MnBi2Te4) series, which have attracted recent interest as intrinsic magnetic topological insulators. Combining circular dichroic, spin-resolved and photon-energy-dependent ARPES measurements with calculations based on density functional theory, we unveil complex momentum-dependent orbital and spin textures in the surface electronic structure and disentangle topological from trivial surface bands. We find that the Dirac-cone dispersion of the topologial surface state is strongly perturbed by hybridization with valence-band states for Bi2Te3-terminated surfaces but remains preserved for MnBi2Te4-terminated surfaces. Our results firmly establish the topologically nontrivial nature of these magnetic van der Waals materials and indicate that the possibility of realizing a quantized anomalous Hall conductivity depends on surface termination.
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000903035 7001_ $$00000-0001-6317-5527$$aBentmann, H.$$b1$$eCorresponding author
000903035 7001_ $$0P:(DE-HGF)0$$aFacio, J. I.$$b2
000903035 7001_ $$0P:(DE-Juel1)165229$$aHeider, Tristan$$b3$$ufzj
000903035 7001_ $$00000-0001-9564-8501$$aKagerer, P.$$b4
000903035 7001_ $$00000-0003-1765-2999$$aFornari, C. I.$$b5
000903035 7001_ $$00000-0001-6629-736X$$aPeixoto, T. R. F.$$b6
000903035 7001_ $$0P:(DE-Juel1)165182$$aFiggemeier, T.$$b7
000903035 7001_ $$0P:(DE-HGF)0$$aJung, S.$$b8
000903035 7001_ $$0P:(DE-HGF)0$$aCacho, C.$$b9
000903035 7001_ $$0P:(DE-HGF)0$$aBüchner, B.$$b10
000903035 7001_ $$0P:(DE-HGF)0$$avan den Brink, J.$$b11
000903035 7001_ $$0P:(DE-Juel1)130948$$aSchneider, C. M.$$b12
000903035 7001_ $$0P:(DE-Juel1)130895$$aPlucinski, L.$$b13
000903035 7001_ $$0P:(DE-HGF)0$$aSchwier, E. F.$$b14
000903035 7001_ $$00000-0002-1945-2352$$aShimada, K.$$b15
000903035 7001_ $$0P:(DE-HGF)0$$aRichter, M.$$b16
000903035 7001_ $$0P:(DE-HGF)0$$aIsaeva, A.$$b17
000903035 7001_ $$0P:(DE-HGF)0$$aReinert, F.$$b18
000903035 773__ $$0PERI:(DE-600)1472655-5$$a10.1103/PhysRevLett.126.176403$$gVol. 126, no. 17, p. 176403$$n17$$p176403$$tPhysical review letters$$v126$$x0031-9007$$y2021
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