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000186447 1001_ $$0P:(DE-Juel1)162163$$aLüpke, F.$$b0$$eCorresponding Author$$ufzj
000186447 245__ $$aHighly unconventional surface reconstruction of ${\mathrm{Na}}_{2}{\mathrm{IrO}}_{3}$ with persistent energy gap
000186447 260__ $$aCollege Park, Md.$$bAPS$$c2015
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000186447 520__ $$aNa2IrO3 is an intriguing material for which spin-orbit coupling plays a key role. Theoretical predictions have been made that the surface of Na2IrO3 should exhibit a clear signature of the quantum spin Hall effect. We studied the surface of Na2IrO3 using scanning tunneling microscopy and density-functional theory calculations. We observed atomic level resolution of the surface and two types of terminations with different surface periodicity and Na content. By comparing bias-dependent experimental topographic images to simulated images, we determined the detailed atomistic structure of both observed surfaces. One of these reveals a strong relaxation to the surface of Na atoms from the subsurface region two atomic layers below. Such dramatic structural changes well below the surface are highly unusual and cast doubt on any prediction of surface properties based on bulk electronic structure. Indeed, using spatially resolved tunneling spectroscopy, we found no indication of the predicted quantum spin Hall behavior.
000186447 536__ $$0G:(DE-HGF)POF3-141$$a141 - Controlling Electron Charge-Based Phenomena (POF3-141)$$cPOF3-141$$fPOF III$$x0
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000186447 7001_ $$0P:(DE-HGF)0$$aManni, S.$$b1
000186447 7001_ $$0P:(DE-HGF)0$$aErwin, S. C.$$b2
000186447 7001_ $$0P:(DE-HGF)0$$aMazin, I. I.$$b3
000186447 7001_ $$0P:(DE-HGF)0$$aGegenwart, P.$$b4
000186447 7001_ $$0P:(DE-HGF)0$$aWenderoth, M.$$b5
000186447 77318 $$2Crossref$$3journal-article$$a10.1103/physrevb.91.041405$$bAmerican Physical Society (APS)$$d2015-01-12$$n4$$p041405$$tPhysical Review B$$v91$$x1098-0121$$y2015
000186447 773__ $$0PERI:(DE-600)2844160-6$$a10.1103/PhysRevB.91.041405$$gVol. 91, no. 4, p. 041405$$n4$$p041405$$tPhysical review / B$$v91$$x1098-0121$$y2015
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000186447 9130_ $$0G:(DE-HGF)POF2-422$$1G:(DE-HGF)POF2-420$$2G:(DE-HGF)POF2-400$$aDE-HGF$$bSchlüsseltechnologien$$lGrundlagen für zukünftige Informationstechnologien$$vSpin-based and quantum information$$x0
000186447 9131_ $$0G:(DE-HGF)POF3-141$$1G:(DE-HGF)POF3-140$$2G:(DE-HGF)POF3-100$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lFuture Information Technology - Fundamentals, Novel Concepts and Energy Efficiency (FIT)$$vControlling Electron Charge-Based Phenomena$$x0
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