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Quasiparticle interference on the surface of Bi2Se3 induced by cobalt adatom in the absence of ferromagnetic ordering

AuthorsYe, M.; Eremeev, S. V.; Krasovskii, E. E.; Chulkov, Eugene V. ; Okamoto, K.; Miyamoto, Koji; Shimada, K.; Namatame, H.; Taniguchi, M.; Kimura, A.
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review B 85: 205317 (2012)
AbstractQuasiparticle interference induced by cobalt adatoms on the surface of the topological insulator Bi2Se3 is studied by scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and x-ray magnetic circular dichroism. It is found that Co atoms are selectively adsorbed on top of Se sites and act as strong scatterers at the surface, generating anisotropic standing waves. A long-range magnetic order is found to be absent, and the surface state Dirac cone remains gapless. The anisotropy of the standing wave is ascribed to the heavily warped iso-energy contour of unoccupied states, where the scattering is allowed due to a nonzero out-of-plane spin. © 2012 American Physical Society.
Descriptionet al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.85.205317
Identifiersdoi: 10.1103/PhysRevB.85.205317
issn: 1098-0121
e-issn: 1550-235X
Appears in Collections:(CFM) Artículos
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