Reply to “Comment on ‘Instability of the topological surface state in Bi2Se3 
upon deposition of gold' ”

Polyakov, A.; Tusche, C.; Ellguth, M.; Crozier, E. D.; Mohseni, K.; Otrokov, M. M.; Zubizarreta Iriarte, X.; Garcia Vergniory, M.; Geilhufe, M.; Chulkov, E. V.; Ernst, A.; Meyerheim, H. L.; Parkin, S. S. P.

doi:10.1103/PhysRevB.98.136202

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Reply to “Comment on ‘Instability of the topological surface state in Bi₂Se₃ upon deposition of gold' ”

MPS-Authors

Polyakov, A.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

Tusche, C.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Ellguth, M.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Mohseni, K.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Zubizarreta Iriarte, X.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Garcia Vergniory, M.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Geilhufe, M.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Ernst, A.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Meyerheim, H. L.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Parkin, S. S. P.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1103/PhysRevB.98.136202
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Citation

Polyakov, A., Tusche, C., Ellguth, M., Crozier, E. D., Mohseni, K., Otrokov, M. M., et al. (2018). Reply to “Comment on ‘Instability of the topological surface state in Bi₂Se₃ upon deposition of gold' ”. Physical Review B, 98(13): 136202. doi:10.1103/PhysRevB.98.136202.

Cite as: https://hdl.handle.net/21.11116/0000-0009-2D3D-2

Abstract

In the Comment on our publication [Phys. Rev. B 95, 180202(R) (2017)], R. A. Gordon claims that our main conclusion is not valid, namely that gold atoms deposited in situ on the (0001) surface of single-crystalline Bi₂Se₃ reside in substitutional sites, i.e., replacing bismuth atoms within the topmost quintuple layer (QL). Based on x-ray absorption near-edge (XANES) spectra and a re-evaluation of extended x-ray absorption fine structure (EXAFS) data above the Au L_III edge, R. A. Gordon concludes that Au resides in a twofold environment as a result of an interface reaction leading to an Au₂S-type local structure, in which gold adopts an Au(I) state and is linearly coordinated by selenium atoms. In this Reply, we will confirm the results published in the original paper and their interpretation that Au atoms reside in the substitutional site.