Journal Article

FZJ-2021-03223

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Vertical position of Sr dopants in the Sr x Bi 2 Se 3 superconductor

Lin, Y.-R.FZJ* ; Bagchi, M. ; Soubatch, S. ; Lee, T.-L. ; Brede, J. (Corresponding author) ; Bocquet, F. C.FZJ* ; Kumpf, C. (Corresponding author)FZJ* ; Ando, Y. ; Tautz, F. S.FZJ*

2021
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/28467  doi:10.1103/PhysRevB.104.054506

Abstract: The discovery of topological superconductivity in doped Bi2Se3 made this class of materials highly important for the field of condensed matter physics. However, the structural origin of the superconducting state remained elusive, despite being investigated intensively in recent years. We use scanning tunneling microscopy and the normal incidence x-ray standing wave (NIXSW) technique in order to determine the vertical position of the dopants—one of the key parameters for understanding topological superconductivity in this material— for the case of SrxBi2Se3. In particular, we analyze the NIXSW data in consideration of the inelastic mean free path of the photoemitted electrons, which allows us to distinguish between symmetry-equivalent sites. We find that Sr atoms are not situated inside the van der Waals gap between the Bi2Se3 quintuple layers but rather in the quintuple layer close to the outer Se planes.

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Contributing Institute(s):

1. Quantum Nanoscience (PGI-3)

Research Program(s):

1. 5213 - Quantum Nanoscience (POF4-521) (POF4-521)
2. DFG project 396769409 - Grundlagen der Photoemissionstomographie (396769409)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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