Journal
PHYSICAL REVIEW B
Volume 88, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.041404
Keywords
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Funding
- VIL-LUM foundation
- Danish National Research Foundation
- Carslberg foundation
- CNPq
- CAPES
- FAPEMIG
- Laboratorio Nacional de Luz Sincrotron (LNLS)
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The surface structure of the prototypical topological insulator Bi2Se3 is determined by low-energy electron diffraction and surface x-ray diffraction at room temperature. Both approaches show that the crystal is terminated by an intact quintuple layer. Specifically, an alternative termination by a bismuth bilayer is ruled out. Surface relaxations obtained by both techniques are in good agreement with each other and found to be small. This includes the relaxation of the van der Waals gap between the first two quintuple layers.
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