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

Physical Review B Volume 85 Issue 20 Page 205317- published_at 2012
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Title ( eng )
Quasiparticle interference on the surface of Bi2Se3 induced by cobalt adatom in the absence of ferromagnetic ordering
Creator
Ye Mao
Eremeev S. V.
Kuroda Kenta
Krasovskii E. E.
Chulkov E. V.
Takeda Yukiharu
Saito Yuji
Okamoto Kazuaki
Zhu S. Y.
Arita Masashi
Ueda Yoshifumi
Source Title
Physical Review B
Volume 85
Issue 20
Start Page 205317
Abstract
Quasiparticle 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.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2012
Rights
(c) 2012 American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.85.205317
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.85.205317