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Quasiperiodic layers of free-electron metals studied using electron diffraction
- Autor(en)
- Ajay Shukla, R. S. Dhaka, S. W. D'Souza, Sanjay Singh, D. Wu, Tommaso A. Lograsso, Marian Krajci, Juergen Hafner, Karsten Horn, Sujata Roy Barman
- Abstrakt
Using electron diffraction, we show that free-electron metals, such as sodium and potassium, form a highly regular quasiperiodic monolayer on the fivefold surface of icosahedral Al-Pd-Mn and that the quasiperiodicity propagates up to the second layer in sodium. Our photoelectron spectroscopy results show that the quasicrystalline alkali-metal adlayer does not exhibit a pseudogap near the Fermi level thought to be characteristic for the electronic structure of quasicrystalline materials. Calculations based on density functional theory provide a model structure for the quasicrystalline alkali-metal monolayer and confirm the absence of a pseudogap.
- Organisation(en)
- Computergestützte Materialphysik
- Externe Organisation(en)
- UGC-DAE Consortium for Scientific Research, Iowa State University, Slovenian Academy of Sciences and Arts, Fritz-Haber-Institut der Max-Planck-Gesellschaft
- Journal
- Physical Review B
- Band
- 79
- Anzahl der Seiten
- 5
- ISSN
- 1098-0121
- DOI
- https://doi.org/10.1103/PhysRevB.79.134206
- Publikationsdatum
- 2009
- Peer-reviewed
- Ja
- ÖFOS 2012
- 1030 Physik, Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/fdfdabc2-b431-4f34-88a2-f16478d09c49