Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep20278
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Funding
- Research Foundation - Flanders (FWO, Belgium)
- Flemish Concerted Research Action program (BOF KU Leuven) [GOA/14/007]
- China Scholarship Council [2011624021]
- FWO
- U.S. National Science Foundation [DMR-1206354]
- San Diego Supercomputer Center (SDSC) Trestles [DMR060009N]
- National Key Projects for Basic Research of China [2013CB922103]
- National Natural Science Foundation of China [91421109, 11522432]
- PAPD project
- Natural Science Foundation of Jiangsu Province [BK20130054]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1206354] Funding Source: National Science Foundation
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We report on the observation of complex superlattices at the surface of the topological insulator Bi2Te3. Scanning tunneling microscopy reveals the existence of two different periodic structures in addition to the Bi2Te3 atomic lattice, which is found to strongly affect the local electronic structure. These three different periodicities are interpreted to result from a single small in-plane rotation of the topmost quintuple layer only. Density functional theory calculations support the observed increase in the DOS near the Fermi level, and exclude the possibility that strain is at the origin of the observed Moire pattern. Exploration of Moire superlattices formed by the quintuple layers of topological insulators holds great potential for further tuning of the properties of topological insulators.
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