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  Direct observation of band bending in the topological insulator Bi2Se3

ViolBarbosa, C. E., Shekhar, C., Yan, B., Ouardi, S., Ikenaga, E., Fecher, G. H., et al. (2013). Direct observation of band bending in the topological insulator Bi2Se3. Physical Review B, 88(19): 195128, pp. 195128-1-195128-4. doi:10.1103/PhysRevB.88.195128.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1E1E-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-F7FD-D
Genre: Journal Article

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 Creators:
ViolBarbosa, C. E.1, Author              
Shekhar, C.2, Author              
Yan, B.3, Author              
Ouardi, S.4, Author              
Ikenaga, E., Author
Fecher, G. H.5, Author              
Felser, C.6, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
3Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              
4Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
5Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
6Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The surface band bending tunes considerably the surface band structures and transport properties in topological insulators. We present a direct measurement of the band bending on the Bi2Se3 by using the bulk sensitive angular-resolved hard x-ray photospectroscopy (HAXPES). We tracked the depth dependence of the energy shift of Bi and Se core states. We estimate that the band bending extends up to about 20 nm into the bulk with an amplitude of 0.23-0.26 eV, consistent with profiles previously deduced from the binding energies of surface states in this material.

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Language(s): eng - English
 Dates: 2013-11-15
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: eDoc: 671359
ISI: 000327158100003
DOI: 10.1103/PhysRevB.88.195128
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Title: Physical Review B
Source Genre: Journal
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Pages: - Volume / Issue: 88 (19) Sequence Number: 195128 Start / End Page: 195128-1 - 195128-4 Identifier: ISSN: 1098-0121