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000009997 084__ $$2WoS$$aPhysics, Multidisciplinary
000009997 1001_ $$0P:(DE-Juel1)130545$$aBihlmayer, G.$$b0$$uFZJ
000009997 245__ $$aSurface- and edge-states in ultrathin Bi-Sb films
000009997 260__ $$a[Bad Honnef]$$bDt. Physikalische Ges.$$c2010
000009997 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000009997 440_0 $$08201$$aNew Journal of Physics$$v12$$x1367-2630$$y065006
000009997 500__ $$aGB is grateful for the hospitality of the Donostia International Physics Center, where part of this work originated, and the financial support of the Deutsche Forschungsgemeinschaft (grant no. BI823/1-1).
000009997 520__ $$aEmploying first-principles calculations, we studied the electronic structure of ultrathin Bi-Sb films, focusing on the appearance of surface or edge states that are topologically protected. Our calculations show that in ordered structures the Bi-Sb bonds are quite strong, forming well-defined double layers that contain both elements. We find surface states appearing on the (111) surface of a thin film of layerwise ordered Bi-Sb compound, while thin films in (110) orientation are insulating. In the gap of this insulator, edge states can be found in a (110)-oriented ribbon in the A17 (black phosphorus) structure. While these states are strongly spin polarized, their topological properties are found to be trivial. In all structures, we investigate the influence of spin-orbit coupling and analyze spin polarization of the states at the boundaries of the material.
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000009997 7001_ $$0P:(DE-HGF)0$$aKoroteev, Y. M.$$b1
000009997 7001_ $$0P:(DE-HGF)0$$aChulkov, E. V.$$b2
000009997 7001_ $$0P:(DE-Juel1)130548$$aBlügel, S.$$b3$$uFZJ
000009997 773__ $$0PERI:(DE-600)1464444-7$$a10.1088/1367-2630/12/6/065006$$gVol. 12$$q12$$tNew journal of physics$$v12$$x1367-2630$$y2010
000009997 8567_ $$uhttp://dx.doi.org/10.1088/1367-2630/12/6/065006
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